1. 1979
2. The history of forests and forestry in Wales up to the formation of the Forestry Commission

   Linnard, W. (Awdur), Ion 1979

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

3. 1974
4. A study of excretion in the slug Agriolimax reticulatus

   Garner, J. (Awdur), Medi 1974

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

5. 1973
6. The effects of trampling and vehicles on natural vegetation.

   Liddle, M. (Awdur), P. Greig-Smith, P. (Goruchwylydd), Mai 1973

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

7. 1970
8. Studies on organ cultures of slug reproductive tracts

   Bailey, T. G. (Awdur), Medi 1970

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

9. 1968
10. A comparative study of morphology, behaviour and ecology of Chaetogaster Limnaei ( von Baer) from several host species

    Buse, A. (Awdur), Medi 1968

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

11. 1966
12. Studies in the flora of the Rhynie chert

    Saadawy, W.E.-S. (Awdur), Meh 1966

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

13. Studies on plant microfossils from the Carboniferous of North Wales

    Hibbert, F. A. (Awdur), Ebr 1966

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

14. Studies on fossil plants of Karoo age from Central & Southern Africa

    Williams, P. (Awdur), Ion 1966

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

15. The genetics and evolution of differences between closely adjacent plant populations, with special reference to heavy metal tolerance

    Antonovics, J. (Awdur), Ion 1966

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

16. Studies on the nutrition and feeding of the larvae of the large cabbage white butterfly, Pieris brassicae L.

    Akhtar, M. (Awdur), 1966

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth