Coleg Gwyddoniaeth a Pheirianneg
- Cyhoeddwyd
Marine climate in the Irish Sea: analysis of a 489-year marine master chronology derived from growth increments in the shell of the clam Arctica islandica
Butler, P., Richardson, C., Scourse, J. D., Wanamaker, A. D., Shammon, T. M. & Bennell, J., 1 Meh 2010, Yn: Quaternary Science Reviews. 29, 13-14, t. 1614-1632Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Ferrocene pincer ligands made easy.
Butler, I., Butler, I. R., Woldt, B., Oh, M. Z. & Williams, D. J., 1 Rhag 2006, Yn: Inorganic Chemistry Communications. 9, 12, t. 1255-1258Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
The first 1,2,3-tris(phosphinomethyl)ferrocene.
Butler, I., Butler, I. R., Horton, P. N., Fortune, K. M., Morris, K., Greenwell, C. H., Eastham, G. R. & Hursthouse, M. B., 1 Gorff 2004, Yn: Inorganic Chemistry Communications. 7, 7, t. 923-928Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Continuous marine radiocarbon reservoir calibration and the 13C Suess effect in the Irish Sea: Results from the first multi-centennial shell-based marine master chronology
Butler, P. G., Scourse, J. D., Richardson, C. A., Wanamaker, A. D., Bryant, C. L. & Bennell, J. D., 30 Maw 2009, Yn: Earth and Planetary Science Letters. 279, 3-4, t. 230-241Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
The design and synthesis of a new potentially c3-symmetric ferrocenylphosphine
Butler, I., Butler, I. R., Drew, M. G., Caballero, A. G., Gerner, P. & Greenwell, C. H., 1 Awst 2003, Yn: Journal of Organometallic Chemistry. 679, 1, t. 59-64Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Managing the complexity of implementation: linking receptivity to complex systems
Butler, M. J. R. & Allen, P., 2007.Allbwn ymchwil: Cyfraniad at gynhadledd › Papur
- Cyhoeddwyd
Sitting Out the Halogen Dance. Room-Temperature Formation of 2,2′-Dilithio-1,1′-dibromoferrocene. TMEDA and Related Lithium Complexes: A Synthetic Route to Multiply Substituted Ferrocenes
Butler, I. R., 11 Hyd 2021, Yn: Organometalics. 40, 19, t. 3240-3244 5 t.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
The self-indicating preparation of bromoferrocenes from stannylferrocenes and an improved synthesis of di-iodoferrocene
Butler, I. R., Mehdar, Y. T. H. & Al-Taie, Z. S., Medi 2020, Yn: Heliyon. 6, 9, t. e04824Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
1,1′,2,2′-Tetralithioferrocene and 1,1′,2,2′,3,3′-Hexalithioferrocene: Useful Additions to Ferrocene Precursor Compounds
Butler, I., Evans, D., Horton, P., Coles, S. & Murphy, P., 8 Maw 2021, Yn: Organometallics. 40, 5, t. 600-605 6 t.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
The effect of mirabilite precipitation on the absolute and practical salinities of sea ice brines
Butler, B., Papadimitriou, E. & Kennedy, H., 20 Awst 2016, Yn: Marine Chemistry. 184, August, t. 21-31Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Ferrocene-based ligands in ruthenium alkylidene chemistry.
Butler, I., Butler, I. R., Coles, S. J., Hursthouse, M. B., Roberts, D. J. & Fujimoto, N., 1 Meh 2003, Yn: Inorganic Chemistry Communications. 6, 6, t. 760-762Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Directly-linked intramolecular donor-acceptor compounds of ferrocene and tetracyanoanthraquinodimethane
Butler, I., Kelly, G., Darviche, F., Robertson, N., Gelbrich, T., Hursthouse, M. B., Thomas, D. A. & Butler, I. R., 1 Hyd 2005, Yn: Inorganic Chemistry Communications. 8, 10, t. 874-877Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Ferrocenylmethylphosphines ligands in the palladium-catalysed synthesis of methyl propionate
Butler, I., Butler, I. R., Baker, P. K., Eastham, G. R., Fortune, K. M., Horton, P. N. & Hursthouse, M. B., 1 Medi 2004, Yn: Inorganic Chemistry Communications. 7, 9, t. 1049-1052Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Ferrocenyl-substituted fluorescent anthracenes and anthraquinones.
Butler, I., Butler, I. R., Callabero, A. G., Kelly, G. A., Amey, J. R., Kraemer, T., Thomas, D. A., Light, M. E., Gelbrich, T. & Coles, S. J., 12 Ion 2004, Yn: Tetrahedron Letters. 45, 3, t. 467-472Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Multi-centennial Arctica islandica master chronology from the Irish Sea: radiocarbon reservoir corrections, Suess effect, stratification dynamics and volcanic eruptions.
Butler, P. G., Scourse, J. D., Richardson, C. A., Wanamaker, A. D., Bryant, C., Shammon, T. & Bennell, J. D., 1 Ion 2008.Allbwn ymchwil: Cyfraniad at gynhadledd › Papur
- Cyhoeddwyd
Gypsum and hydrohalite dynamics in sea ice brines
Butler, B., Papadimitriou, S., Day, S. J. & Kennedy, H., Medi 2017, Yn: Geochimica et Cosmochimica Acta. t. 17-34Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
An investigation of mineral dynamics in frozen seawater brines by direct measurement with synchrotron X-ray powder diffraction
Butler, B. M. & Kennedy, H. A., 14 Awst 2015, Yn: Journal of Geophysical Research. 8, t. 5686-5697Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Ferrocenylanthracene polymers: the direct synthesis using "Lawesson's Reagent"
Butler, I., Butler, I. R., Caballero, A. G. & Kelly, G. A., 1 Meh 2003, Yn: Inorganic Chemistry Communications. 6, 6, t. 639-642Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
The fimbrial adhesin F17-G of enterotoxigenic Escherichia coli has an immunoglobulin-like lectin domain that binds N-acetylglucosamine
Buts, L., Bouckaert, J., De Genst, E., Loris, R., Oscarson, S., Lahmann, M., Messens, J., Brosens, E., Wyns, L. & De Greve, H., 1 Awst 2003, Yn: Molecular Microbiology. 49, 3, t. 705-715Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Solving the phase problem for carbohydrate-binding proteins using selenium derivatives of their ligands: a case study involving the bacterial F17-G adhesin
Buts, L., Loris, R., De Genst, E., Oscarson, S., Lahmann, M., Messens, J., Brosens, E., Wyns, L., De Greve, H. & Bouckaert, J., 1 Meh 2003, Yn: Acta Crystallographica Section D: Biological Crystallography. 59, 6, t. 1012-1015Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Addition of iron to agricultural topsoil and subsoil is not an effective C sequestration strategy
Button, E. S., Chadwick, D. R. & Jones, D. L., 1 Maw 2022, Yn: Geoderma. 409, 115646.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Deep-C storage: Biological, chemical and physical strategies to enhance carbon stocks in agricultural subsoils
Button, E. S., Pett-Ridge, J., Murphy, D. V., Kuzyakov, Y., Chadwick, D. R. & Jones, D. L., Gorff 2022, Yn: Soil Biology and Biochemistry. 170, 1 t., 108697.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Separating N2O production and consumption in intact agricultural soil cores at different moisture contents and depths
Button, E. S., Marsden, K. A., Nightingale, P. D., Dixon, E. R., Chadwick, D. R., Cárdenas, L. M. & Jones, D. L., 4 Ebr 2023, Yn: European Journal of Soil Science. 74, 2, t. e13363Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Greenhouse gas production, diffusion and consumption in a soil profile under maize and wheat production
Button, E. S., Marshall, M., Sanchez-Rodriguez, A. R., Blaud, A., Abadie, M., Chadwick, D. R. & Jones, D. L., 1 Chwef 2023, Yn: Geoderma. 430, 116310.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Glycymeris bimaculata (Poli, 1795) — A new sclerochronological archive for the Mediterranean?
Bušelić, I., Peharda, M., Reynolds, D. J., Butler, P. G., González, A. R., Ezgeta-Balić, D., Vilibić, I., Grbec, B., Hollyman, P. R. & Richardson, C. A., 27 Gorff 2014, Yn: Journal of Sea Research. 95, t. 139–148Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Integrating climate change adaptation into biodiversity and forestry assessments and programming
Byers, B. & Cameron, A., 1 Meh 2013, US Agency for International Development. 71 t.Allbwn ymchwil: Llyfr/Adroddiad › Adroddiad Comisiwn
- Cyhoeddwyd
Evaluating genetic traceability methods for captive-bred marine fish and their applications in fisheries management and wildlife forensics
Bylemans, J., Maes, G. E., Diopere, E., Cariani, A., Senn, H., Taylor, M. I., Helyar, S., Bargelloni, L., Bonaldo, A., Carvalho, G., Guarniero, I., Komen, H., Martinsohn, J. T., Nielsen, E. E., Tinti, F., Volckaert, F. A. M. & Ogden, R., 25 Chwef 2016, Yn: Aquaculture Environment Interactions. 8, t. 131-145Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Tides: A key environmental driver of osteichthyan evolution and the fish-tetrapod transition?
Byrne, H. M., Green, J. A. M., Balbus, S. A. & Ahlberg, P. E., 28 Hyd 2020, Yn: Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences. 476, 2242, 1 t., 20200355.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
The double high tide at Port Ellen: Doodson's criterion revisited
Byrne, H., Green, M. & Bowers, D., 20 Gorff 2017, Yn: Ocean Science. 13, t. 599-607Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Water quality impacts and river system recovery following the 2014 Mount Polley mine tailings dam spill, British Columbia, Canada
Byrne, P., Hudson-Edwards, K., Bird, G., Macklin, M., Brewer, P., Williams, R. & Jamieson, H., Ebr 2018, Yn: Applied Geochemistry. 91, t. 64-74Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
The long-term environmental impacts of the Mount Polley mine tailings spill, British Columbia, Canada
Byrne, P., Hudson-Edwards, K., Macklin, M., Brewer, P., Bird, G. & Williams, R., 2015, Geophysical Research Abstracts. Cyfrol 17. EGU2015-6241Allbwn ymchwil: Pennod mewn Llyfr/Adroddiad/Trafodion Cynhadledd › Cyfraniad i Gynhadledd › adolygiad gan gymheiriaid
- Cyhoeddwyd
Proton-Driven Amide Bond-Cleavage Pathways of Gas-Phase Peptide Ions Lacking Mobile Protons
Bythell, B. J., Suhai, S., Somogyi, A. & Paizs, B., 11 Medi 2009, Yn: Journal of the American Chemical Society. 131, 39, t. 14057-14065Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Cyclization and Rearrangement Reactions of an Fragment Ions of Protonated Peptides
Bythell, B. J., Maître, P. & Paizs, B., 6 Hyd 2010, Yn: Journal of the American Chemical Society. 132, 42, t. 14766-14779Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Микроорганизмы из пищеварительного тракта дождевых червей
Byzov, B. A., Nechitaĭlo, T. I., Bumazhkin, B. K., Kurakov, A. V., Golyshin, P. N. & Zviagintsev, D. G., 8 Gorff 2009, Yn: Mikrobiologiia. 78, 3, t. 404-13 10 t.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Culturable microorganisms from the earthworm digestive tract
Byzov, B. A., Nechitaylo, T. Y., Bumazhkin, B. K., Kurakov, A. V., Golyshin, P. N. & Zvyagintsev, D. G., Meh 2009, Yn: Microbiology. 78, 3, t. 360-368Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Mre11 exonuclease activity removes the chain-terminating nucleoside analog gemcitabine from the nascent strand during DNA replication
Böckemeier, L., Kraehenbuehl, R., Keszthelyi, A., Gasasira, M. U., Vernon, E., Beardmore, R., Broberg Vågbø, C., Chaplin, D., Collins, S., Krokan, H. E., Lambert, S. A. E., Paisz, B. & Hartsuiker, E., 29 Mai 2020, Yn: Science Advances. 6, 22, 9 t., eaaz4126.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
The conservation status of the world’s reptiles
Böhm, M., Collen, B., Baillie, J. E., Bowles, P., Chanson, J., Cox, N., Hammerson, G., Hoffmann, M., Livingstone, S. R., Ram, M., Rhodin, A. G., Stuart, S. N., van Dijk, P. P., Young, B. E., Afuang, L. E., Aghasyan, A., García, A., Aguilar, C., Ajtic, R., Akarsu, F., Alencar, L. R., Allison, A., Ananjeva, N., Anderson, S., Andrén, C., Ariano-Sánchez, D., Arredondo, J. C., Auliya, M., Austin, C. C., Avci, A., Baker, P. J., Barreto-Lima, A. F., Barrio-Amorós, C. L., Basu, D., Bates, M. F., Batistella, A., Bauer, A., Bennett, D., Böhme, W., Broadley, D., Brown, R., Burgess, J., Captain, A., Carreira, S., del Rosario Castañeda, M., Castro, F., Catenazzi, A., Cedeño-Vázquez, J. R., Chapple, D. G., Cheylan, M., Cisneros-Heredia, D. F., Cogalniceanu, D., Cogger, H., Corti, C., Costa, G. C., Couper, P. J., Courtney, T., Crnobrnja-Isailovic, J., Crochet, P. A., Crother, B., Cruz, F., Daltry, J. C., Daniels, R. J., Das, A., de Silva, A., Diesmos, A. C., Dirksen, L., Doan, T. M., Dodd Jr., C. K., Doody, J. S., Dorcas, M. E., de Barros Filho, J. D., Egan, V. T., El Mouden, E. H., Embert, D., Espinoza, R. E., Fallabrino, A., Feng, X., Feng, S. J., Fitzgerald, L., Flores-Villela, O., França, F. G., Frost, D., Gadsden, H., Gamble, T., Ganesh, S. R., Garcia, M. A., García-Pérez, J. E., Gatuscm, J., Gaulke, M., Geniez, P., Georges, A., Gerlach, J., Goldberg, S., Gonzale, J. C., Gower, D. J., Grant, T., Greenbaum, E., Grieco, C., Guo, P., Hamilton, A. M., Hare, K., Hedges, S. B., Heideman, N., Hilton-Taylor, C., Hitchmough, R., Hollingsworth, B., Hutchinson, M., Ineich, I., Iverson, J., Jaksic, F. M., Jenkins, R., Joger, U., Jose, R., Kaska, Y., Kaya, U., Keogh, J. S., Köhler, G., Kuchling, G., Kumlutaş, Y., Kwet, A., La Marca, E., Lamar, W., Lane, A., Lardner, B., Latta, C., Latta, G., Lau, M., Lavin, P., Lawson, D., LeBreton, M., Lehr, E., Limpus, D., Malhotra, A. & et al., [. V., 1 Ion 2013, Yn: Biological Conservation. 157, t. 372-385Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Intraspecific leaf trait variability along a boreal-to-tropical community diversity gradient
C. Bastias, C., Fortunel, C., Valladares, F., Baraloto, C., Benavides, R., Cornwell, W., Markesteijn, L., de Oliveira, A. A., Sansevero, J. B. B., Vaz, M. C. & Kraft, N. J. B., 27 Chwef 2017, Yn: PLoS ONE. 12, 2, t. 1-16Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Remote aromatic stabilization in radical reactions.
Cabellero, A. G., Croft, A. K. & Nalli, S. M., 26 Mai 2008, Yn: Tetrahedron Letters. 49, 22, t. 3613-3615Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
The Second-Order Adjoint Sensitivity Analysis Methodology
Cacuci, D., 28 Chwef 2018, 1st gol. Boca Raton: Chapman and Hall/CRC. 306 t. (Advances in Appled Mathematics)Allbwn ymchwil: Llyfr/Adroddiad › Llyfr
- Cyhoeddwyd
Predictive Modeling of Coupled Multi-Physics Systems: I. Theory
Cacuci, D., 1 Awst 2014, Yn: Annals of Nuclear Energy. 70, t. 266-278Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
BERRU Predictive Modeling: Best Estimate Results with Reduced Uncertainties
Cacuci, D., 18 Chwef 2019, Heidelberg/New York: Springer Verlag. 392 t.Allbwn ymchwil: Llyfr/Adroddiad › Llyfr
- Cyhoeddwyd
A Paradigm-Shifting Methodology for Sensitivity Analysis of Multiplying Nuclear Systems
Cacuci, D., Maw 2017, Yn: Nuclear Science and Engineering. 185, 3, t. 361-383Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Computational Methods for Data Evaluation and Assimilation
Cacuci, D., Navon, I. M. & Ionescu-Bujor, M., 21 Awst 2013, Boca Roaton: Chapman and Hall/CRC. 373 t.Allbwn ymchwil: Llyfr/Adroddiad › Llyfr
- Cyhoeddwyd
Cleaner wrasse forage on ectoparasitic digeneans (phylum Platyhelminthes) that infect pelagic thresher sharks (Alopias pelagicus)
Cadwallader, H. F., Turner, J. R. & Oliver, S. P., 3 Rhag 2015, Yn: Marine Biodiversity. 45, 4, t. 613-614Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Synthesis and epimerisation studies on carbohydrate derived bicyclic tetronate esters: The synthesis of furanofurans related to the cytotoxic metabolite goniofufurone
Cagnolini, C., Ferri, M., Jones, P. R., Murphy, P. J., Ayres, B. & Cox, B., 31 Maw 1997, Yn: Tetrahedron. 53, 13, t. 4815-4820 6 t.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Incorporating wood density in breeding programs for softwoods in Europe: a strategy and associated methods.
Cahalan, C. M., Rozenberg, P., Franc, A. & Cahalan, C., 1 Ion 2001, Yn: Silvae Genetica. 50, 1, t. 1-7Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Genetic improvement of wood quality: improving selection efficiency for different end uses.
Cahalan, C. M., Lloyd-Jones, G., Mayhead, G. J., Snell, R., Hannrup, B., Karisson, B., Plomion, C., Rozenberg, P., Grabner, M., Rosner, S., Wimmer, R., Pereira, H., Rodrigues, J. C., Le Bayon, I., Chantre, G., Fladung, M. & Markussen, T., 1 Ion 2002, 2002 gol. Unknown.Allbwn ymchwil: Llyfr/Adroddiad › Adroddiad Comisiwn
- Cyhoeddwyd
Genetic parameters of growth and wood quality traits in Picea abies.
Cahalan, C. M., Hannrup, B., Cahalan, C., Chantre, G., Grabner, M., Karlsson, B., Le Bayon, I., Lloyd-Jones, G., Muller, U., Pereira, H., Rodrigues, J. C., Rosner, S., Rozenberg, P., Wilhelmsson, L. & Wimmer, R., 1 Chwef 2004, Yn: Scandinavian Journal of Forest Research. 19, 1, t. 14-29Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
The effect of two treeshelter heights and three pruning regimes on the growth and form of sessile oak (Quercus petraea (Matt.) Liebl.)
Cahalan, C. M., Mojeremane, W. & Cahalan, C., 1 Ion 2004, Yn: Quarterly Journal of Forestry. 98, t. 107-112Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid