1. 1970
2. Studies on organ cultures of slug reproductive tracts

   Awdur: Bailey, T. G., Medi 1970

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

3. 1968
4. 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

5. 1966
6. Studies in the flora of the Rhynie chert

   Awdur: Saadawy, W. E., Meh 1966

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

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

   Awdur: Hibbert, F. A., Ebr 1966

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

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

   Awdur: Williams, P., Ion 1966

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

9. 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

10. 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

11. 1965
12. Comparative studies in the pathology of radiomimetic conditions

    Awdur: Mason, J., Medi 1965

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

13. 1963
14. An ecological study of Chaetogaster limnaei( von Baer)

    Awdur: Gruffydd, L. D., Ebr 1963

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

15. 1959
16. Calcareous algae of the silurian of the Welsh border

    Awdur: Green, H., Ebr 1959

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

17. 1958
18. 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