1. 1966
2. Studies in the flora of the Rhynie chert

   Awdur: Saadawy, W. E., Meh 1966

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

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

   Awdur: Hibbert, F. A., Ebr 1966

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

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

   Awdur: Williams, P., Ion 1966

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

5. 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

6. 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

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

   Awdur: Mason, J., Medi 1965

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

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

    Awdur: Gruffydd, L. D., Ebr 1963

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

11. 1960
12. Seasonal changes in the plankton of inshore waters: with special reference to the life history of certate copepods

    Awdur: Haq, S. M., 1960

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

13. 1959
14. Calcareous algae of the silurian of the Welsh border

    Awdur: Green, H., Ebr 1959

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

15. 1958
16. 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