1. 1966
2. Studies on plant microfossils from the Carboniferous of North Wales

   Awdur: Hibbert, F. A., Ebr 1966

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

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

   Awdur: Williams, P., Ion 1966

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

4. 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

5. 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

6. 1965
7. Comparative studies in the pathology of radiomimetic conditions

   Awdur: Mason, J., Medi 1965

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

8. 1963
9. An ecological study of Chaetogaster limnaei( von Baer)

   Awdur: Gruffydd, L. D., Ebr 1963

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

10. 1959
11. Calcareous algae of the silurian of the Welsh border

    Awdur: Green, H., Ebr 1959

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

12. 1958
13. A Study in the Experimental Taxonomy of some British Sphagha (section Cuspidata),with observations of their ecology.

    Awdur: Agnew, S., 5 Mai 1958

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth