1. 1972
2. The natural vegetation of the Sabah and natural regeneration of the Dipterocarp Forests.

   Awdur: Fox, J. E. D., Meh 1972

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

3. 1971
4. The population biology of Littorina obtusata (L) (Gastropoda: Prosobranchiata).

   Awdur: Guiterman, J. D., Hyd 1971

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

5. 1970
6. Studies on organ cultures of slug reproductive tracts

   Awdur: Bailey, T. G., Medi 1970

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

7. 1968
8. A comparative study of morphology, behaviour and ecology of Chaetogaster Limnaei ( von Baer) from several host species

   Awdur: Buse, A., Medi 1968

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

9. 1966
10. Studies in the flora of the Rhynie chert

    Awdur: Saadawy, W. E., Meh 1966

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

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

    Awdur: Hibbert, F. A., Ebr 1966

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

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

    Awdur: Williams, P., Ion 1966

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

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

    Awdur: Antonovics, J., Ion 1966

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

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

    Awdur: Akhtar, M., 1966

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

15. 1965
16. Comparative studies in the pathology of radiomimetic conditions

    Awdur: Mason, J., Medi 1965

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth