Ysgol Gwyddorau Amgylcheddol a Naturiol
- Erthygl › Ymchwil › Adolygwyd gan gymheiriaid
- Cyhoeddwyd
Onto the farm, into the home: how intrahousehold gender dynamics shape land restoration in Eastern Kenya
Pagella, T., Crossland, M., Sinclair, F., Paez Valencia, A. M., Magaju, C., Kiura, E. & Winowiecki, L., 1 Maw 2021, Yn: Ecologiical Restoration. 39, 1-2, t. 90-107Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Operationalizing the Definition of Forest Degradation for REDD+, with Application to Mexico
Morales-Barquero, L., Skutsch, M., Jardel-Pelaez, E. J., Ghilardi, A., Kleinn, S. & Healey, J. R., 11 Gorff 2014, Yn: Forests. 5, 7, t. 1653-1681Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Opinions of the public, conservationists and magistrates on sentencing wildlife trade crimes in the UK
St John, F. A. V., Edwards-Jones, G. & Jones, J. P. G., Meh 2012, Yn: Environmental Conservation. 39, 2, t. 154-161Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Opportunistic viral surveillance confirms the ongoing disease threat grey squirrels pose to sympatric red squirrel populations in the UK
Everest, DJ., Green, C., Dastjerdi, A., Davies, H., Cripps, R., McKinney, C., Podgornik, G., Stinson, M., O'Hare, S., Bonnie, S., Mill, A., Van der wall, Z., Robinson, N., Trotter, S. & Shuttleworth, C., 20 Mai 2023, Yn: Veterinary Record. 192, 10, e2834.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Optical fiber long-period gratings with Langmuir-Blodgett thin-film overlays.
Rees, N. D., James, S. W., Tatam, R. P. & Ashwell, G. J., 1 Mai 2002, Yn: Optics Letters. 27, 9, t. 686-688Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Optimal intron analyses in the Trimeresurus radiation of Asian pitvipers.
Creer, S., Pook, C. E., Malhotra, A. & Thorpe, R. S., 1 Chwef 2006, Yn: Systematic Biology. 55, 1, t. 57-72Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Optimal rotation under continually – or continuously – declining discount rate
Price, C., Cooper, R. & Taylor, R., 1 Ion 2009, Yn: Scandinavian Forest Economics. 42, t. 66-74Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Optimisation of the anaerobic digestion of agricultural resources.
Ward, A. J., Hobbs, P. J., Holliman, P. J. & Jones, D. L., 1 Tach 2008, Yn: Bioresource Technology. 99, 17, t. 7928-7940Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Optimising storage conditions and processing of sheep urine for nitrogen cycle and gaseous emission measurements from urine patches
Charteris, A. F., Marsden, K. A., Evans, J. R., Barrat, H. A., Loick, N., Jones, D. L., Chadwick, D. R. & Cárdenas, L. M., 9 Meh 2021, Yn: Scientific Reports. 11, 1, 12116.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Optimising sustainability: Circular pathways for Scotch Whisky distillery co-products
Duffy, C., Styles, D., Schestak, I., Macgregor, K., Jack, F., Henn, D., Black, K. & Iannetta, P. P. M., 1 Ebr 2023, Yn: Journal of Cleaner Production. 395, 136436.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Optimising the detection of marine taxonomic richness using environmental DNA metabarcoding: the effects of filter material, pore size and extraction method
Deiner, K., Lopez, J., Bourne, S., Holman, L. E., Seymour, M., Grey, E. K., Lacoursiere-Roussel, A., Li, Y., Renshaw, M. A., Pfrender, M. E., Rius, M., Bernatchez, L. & Lodge, D. M., 2 Tach 2018, Yn: Metabarcoding and Metagenomics. 2, 15 t., e28963.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Optimizing chamber methods for measuring nitrous oxide emissions from plot-based agricultural experiments
Chadwick, D. R., Cardenas, L., Misselbrook, T. H., Smith, K. A., Rees, R. M., Watson, C. J., McGeough, K. L., Williams, J. R., Cloy, J. M., Thorman, R. E. & Dhanoa, M. S., 9 Ion 2014, Yn: European Journal of Soil Science. 65, 2, t. 295-307Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Optimizing the use of on-street car parking system as a passive control of air pollution exposure in street canyons by large eddy simulation
Gallagher, J., Gill, L. W. & MacNabola, A., 1 Ion 2011, Yn: Atmospheric Environment. 45, 9, t. 1684-1694Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Organic Carbon Linkage with Soil Colloidal Phosphorus at Regional and Field Scales: Insights from Size Fractionation of Fine Particles
Li, F., Zhang, Q., Klumpp, E., Bol, R., Nischwitz, V., Ge, Z. & Liang, X., 4 Mai 2021, Yn: Environmental Science and Technology. 55, 9, t. 5815-5825 11 t.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Organic acid behavior in soils: misconceptions and knowledge gaps.
Jones, D. L., Dennis, P. G., Owen, A. G. & Van Hees, P. A., 1 Ion 2003, Yn: Plant and Soil. 248, 1-2, t. 31-41Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Organic acid behaviour in a calcareous soil: implications for rhizosphere nutrient cycling.
Strom, L., Owen, A. G., Godbold, D. L. & Jones, D. L., 1 Tach 2005, Yn: Soil Biology and Biochemistry. 37, 11, t. 2046-2054Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Organic acid behaviour in a calcareous soil: sorption reactions and biodegradation rates.
Strom, L., Owen, A. G., Godbold, D. L. & Jones, D. L., 1 Rhag 2001, Yn: Soil Biology and Biochemistry. 33, 15, t. 2125-2133Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Organic acid concentrations in soil solution: effects of young coniferous trees and ectomycorrhizal fungi.
Jentschke, G. W., Van Hees, P. A., Jones, D. L., Jentschke, G. & Godbold, D. L., 1 Ebr 2005, Yn: Soil Biology and Biochemistry. 37, 4, t. 771-776Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Organic acid mediated P mobilization in the rhizosphere and uptake by maize roots.
Strom, L., Owen, A. G., Godbold, D. L. & Jones, D. L., 1 Mai 2002, Yn: Soil Biology and Biochemistry. 34, 5, t. 703-710Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Organic acid mediated nutrient extraction efficiency in three calcareous soils.
Khademi, Z., Jones, D. L., Malakouti, M. J., Asadi, F. & Ardebili, M., 31 Maw 2009, Yn: Australian Journal of Soil Research. 47, 2, t. 213-220Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Organic acids alleviate iron chlorosis in chickpea grown on two p-fertilized soils
Sanchez-Rodriguez, A. R., del Campillo, M. C., Torrent, J. & Jones, D., 12 Mai 2014, Yn: Journal of Soil Science and Plant Nutrition. 14, 2, t. 290-301Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Organic and elemental elucidation of asphaltene fraction of Nigerian crude oils
Adebiyi, F. M. & Thoss, V., 8 Tach 2013, Yn: Fuel. 118, t. 426-431Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Organic and inorganic sulfur and nitrogen uptake by co-existing grassland plant species competing with soil microorganisms
Ma, Q., Xu, M., Liu, M., Cao, X., Hill, P. W., Chadwick, D. R., Wu, L. & Jones, D. L., 1 Mai 2022, Yn: Soil Biology and Biochemistry. 168Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Organic biomolecules bind to phosphate through borate linkages in aqueous solution: a possible role of boron as a phosphorylation chaperone in the prebiotic world
Aydogmus, N., Kose, D. A., Beckett, M. A. & Zumreoglu Karan, B., 11 Meh 2014, Yn: Turkish Journal of Chemistry. 38, t. 617-628Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Organic mulching masks rhizosphere effects on carbon and nitrogen fractions and enzyme activities in urban greening space
Sun, X., Ye, Y., Guan, Q. & Jones, D. L., 1 Ebr 2021, Yn: Journal of Soils and Sediments. 21, 4, t. 1621-1632Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Organic mulching promotes soil organic carbon accumulation to deep soil layer in an urban plantation forest
Sun, X., Wang, G., Ma, Q., Liao, J., Wang, D., Guan, Q. & Jones, D. L., 1 Rhag 2021, Yn: Forest Ecosystems. 8, 1Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Organic nitrogen mineralisation in two contrasting agro-ecosystems is unchanged by biochar addition
Dempster, D. N., Jones, D. L. & Murphy, D. V., Mai 2012, Yn: Soil Biology and Biochemistry. 48, t. 47-50Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Organic phosphorus in the terrestrial environment: a perspective on the state of the art and future priorities
George, T. S., Giles, C. D., Menezes-Blackburn, D., Condron, L. M., Gama-Rodrigues, A. C., Jaisi, D., Lang, F., Neal, A. L., Stutter, M. I., Almeida, D. S., Bol, R., Cabugao, K. G., Celi, L., Cotner, J. B., Feng, G., Goll, D. S., Hallama, M., Krueger, J., Plassard, C., Rosling, A., Darch, T., Fraser, T., Giesler, R., Richardson, A. E., Tamburini, F., Shand, C. A., Lumsdon, D. G., Zhang, H., Blackwell, M. S. A., Wearing, C., Mezeli, M. M., Almas, A. R., Audette, Y., Bertrand, I., Beyhaut, E., Boitt, G., Bradshaw, N., Brearley, C. A., Bruulsema, T. W., Ciais, P., Cozzolino, V., Duran, P. C., Mora, M. L., de Menezes, A. B., Dodd, R. J., Dunfield, K., Engl, C., Frazao, J. J., Garland, G., Jimenez, J. L. G., Graca, J., Granger, S. J., Harrison, A. F., Heuck, C., Hou, E. Q., Johnes, P. J., Kaiser, K., Kjaer, H. A., Klumpp, E., Lamb, A. L., Macintosh, K. A., Mackay, E. B., McGrath, J., McIntyre, C., McLaren, T., Meszaros, E., Missong, A., Mooshammer, M., Negron, C. P., Nelson, L. A., Pfahler, V., Poblete-Grant, P., Randall, M., Seguel, A., Seth, K., Smith, A. C., Smits, M. M., Sobarzo, J. A., Spohn, M., Tawaraya, K., Tibbett, M., Voroney, P., Wallander, H., Wang, L., Wasaki, J. & Haygarth, P. M., Meh 2018, Yn: Plant and Soil. 427, 1-2, t. 191-208Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Organic rectifying junctions fabricated by ionic coupling.
Ashwell, G. J., Ewington, J. & Robinson, B. J., 14 Chwef 2006, Yn: Chemical Communications. 6, t. 618-620Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Organic rectifying junctions from an electron-accepting molecular wire and an electron-donating phthalocyanine
Ashwell, G. J., Tyrrell, W. D., Urasinska, B., Wang, C. S. & Bryce, M. R., 26 Ebr 2006, Yn: Chemical Communications. 15, t. 1640-1642Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Organophosphoryl adducts of tris (pentafluorophenyl) borane; Crystal and molecular structure of B(C6F5)3Ph3PO
Beckett, M. A., Brassington, D. S., Light, M. E. & Hursthouse, M. B., 1 Meh 2001, Yn: Journal of the Chemical Society Dalton Transactions. 11, t. 1768-1772Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Orientation and flight behaviour identify the Soprano pipistrelle as a migratory bat species at the Baltic Sea coast
Lindecke, O., Elksne, A., Holland, R., Petersons, G. & Voigt, C. C., 1 Mai 2019, Yn: Journal of Zoology. 308, 1, t. 56-65Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Orientation-induced molecular rectification and nonlinear optical properties of a squaraine derivative
Ashwell, G. J., Ewington, J. & Moczko, K., 1 Ion 2005, Yn: Journal of Materials Chemistry. 15, 11, t. 1154-1159Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Origin and fate of Vanadium in the Hazeltine Creek Catchment following the 2014 Mount Polley mine tailings spill, British Columbia, Canada
Hudson-Edwards, K. A., Byrne, P., Bird, G., Brewer, P. A., Burke, I. T., Jamieson, H. E., Macklin, M. G. & Williams, R. D., 16 Ebr 2019, Yn: Environmental Science and Technology. 53, 8, t. 4088–4098Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Origin and phylogenetic position of the Lesser Antillean species of Bothrops (Serpentes: Viperidae): biogeographical and medical implications.
Wuster, W., Wüster, W., Thorpe, R. S., Salomao, M. G., Thomas, L., Puorto, G., Theakston, R. D. & Warrell, D. A., 1 Ion 2002, Yn: Bulletin of the Natural History Museum London (Zoology). 68, t. 101-106Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Origin of the eastern brownsnake, Pseudonaja textilis (Dumeril, Bibron and Dumeril) (Serpentes : Elapidae : Hydrophiinae) in New Guinea: evidence of multiple dispersals from Australia, and comments on the status of Pseudonaja textilis pughi Hoser 2003.
Wuster, W., Williams, D. J., O'Shea, M., Daguerre, R. L., Pook, C. E., Wüster, W., Hayden, C. J., McVay, J. D., Paiva, O., Matainaho, T., Winkel, K. D. & Austin, C. C., 1 Ion 2008, Yn: Zootaxa. 1703, t. 47-61Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Our life companions: The human follicular mite Demodex folliculorum
Perotti, M. A. & Braig, H. R., 30 Tach 2022, Yn: Zoosymposia. 22, t. 29-31Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Outlier SNP markers reveal fine-scale genetic structuring across European hake populations (Merluccius merluccius)
Milano, I., Babbucci, M., Cariani, A., Atanassova, M., Bekkevold, D., Carvalho, G., Espineira, M., Fiorentino, F., Garofalo, G., Geffen, A., Hansen, J. H., Helyar, S. J., Nielsen, E. E., Ogden, R., Patarnello, T., Stagioni, M., Tinti, F. & Bargelloni, L., 18 Tach 2013, Yn: Molecular Ecology. 23, 1, t. 118-135Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Overlap not Gap: Understanding the Relationship between Animal Communication and Language with Prototype Theory
Amphaeris, J., Shannon, G. & Tenbrink, T., Meh 2022, Yn: Lingua. 272, 103332.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Overriding water table control on managed peatland greenhouse gas emissions
Evans, C. D., Peacock, M., Baird, A. J., Artz, R. R. E., Burden, A., Callaghan, N., Chapman, P. J., Cooper, H. M., Coyle, M., Craig, E., Cumming, A., Dixon, S., Gauci, V., Grayson, R. P., Helfter, C., Heppell, C. M., Holden, J., Jones, D. L., Kaduk, J., Levy, P., Matthews, R., McNamara, N. P., Misselbrook, T., Oakley, S., Page, S. E., Rayment, M., Ridley, L., Stanley, K. M., Williamson, J. L., Worrall, F. & Morrison, R., 27 Mai 2021, Yn: Nature. 593, t. 548-552Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Oxalate and ferricrocin exudation by the extramatrical mycelium of an ectomycorrhizal fungus in symbiosis with Pinus sylvestris.
Van Hees, P. A., Rosling, A., Essen, S., Godbold, D. L., Jones, D. L. & Finlay, R. D., 25 Tach 2005, Yn: New Phytologist. 169, 2, t. 367-377Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Oxalic acid sensors based on sol–gel nanostructured TiO2 films
Morozova, M., Kluson, P., Krysa, J., Gwenin, C. D. & Solcova, O., 1 Ebr 2011, Yn: Journal of Sol-Gel Science and Technology. 58, 1, t. 175-181Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Oxidation of arsenite by Thiomonas strains and characterization of Thiomonas arsenivorans sp nov.
Battaglia-Brunet, F., Joulian, C., Garrido, F., Dictor, M. C., Morin, D., Coupland, K., Johnson, D. B., Hallberg, K. B. & Baranger, P., 1 Ion 2006, Yn: Antonie Van Leeuwenhoek International Journal of General and Molecular Microbiology. 89, 1, t. 99-108Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Oxidoborates templated by cationic nickel(II) complexes and self-assembled from B(OH)3
Altahan, M., Beckett, M., Coles, S. J. & Horton, P. N., 31 Awst 2021, Yn: Inorganics. 9, 9, 68.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Oxidopolyborate anions templated by transition-metal complex cations: Self-assembled syntheses and structural studies (XRD) of [Co(NH3)(6)](2)[B4O5(OH)(4)](3)center dot 11H(2)O, [Ni(phen)(3)][B7O9(OH)(5)]center dot 9.5H(2)O and [Zn(dac)(2)(H2O)(2)][B7O9(OH)(5)]center dot H2O
Altahan, M., Beckett, M., Coles, S. J. & Horton, P. N., 15 Ion 2020, Yn: Journal of Molecular Structure. 1200, 127071Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Oxidopolyborate chemistry: The self-assembled, templated, synthesis, and an XRD study of a 1-D coordination polymer, [Cu(en){B6O7(OH)(6)}](.)3H(2)O (en=1,2-diaminoethane)
Altahan, M., Beckett, M., Coles, S. J. & Horton, P. N., 1 Tach 2020, Yn: Phosphorus, Sulfur and Silicon and the Related Elements. 195, 11, t. 952-956 5 t.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Ozone Tolerance Found in Aegilops tauschii and Primary Synthetic Hexaploid Wheat
Brewster, C., Hayes, F. & Fenner, N., 28 Meh 2019, Yn: Plants. 8, 7, 12 t., 195.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
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Ozone impacts on vegetation in a nitrogen enriched and changing climate
Wagg, S. K., Mills, G., Harmens, H., Wagg, S., Sharps, K., Hayes, F., Fowler, D., Sutton, M. & Davies, B., 26 Medi 2015, Yn: Environmental Pollution. 208, Part B, t. 898-908Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Ozone inhibits phloem laoding from a transport pool: compartmental efflux analysis in Pima cotton
Grantz, D. & Farrar, J. F., 1 Ion 2000, Yn: Australian Journal of Plant Physiology. 27, 8-9, t. 859-868Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
PCR detection of adenovirus in grey squirrels on Anglesey
Everest, D. J., Grierson, S. S., Stidworthy, M. & Shuttleworth, C., 31 Hyd 2009, Yn: Veterinary Record. 165, t. 482Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid