1. 1981
2. Studies on the male reproductive cycle in the lizard Chalcides Ocellatus.

   Awdur: Mahmoud, F. M. S., Mai 1981

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

3. Micronutrient studies on cotton growth on Syrian calcareous soils.

   Awdur: Mohammad, S. Y., Maw 1981

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

4. Elementary education in Caernarvonshire 1839-1902

   Awdur: Williams, H. G., Ion 1981

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

5. The development of guidance and counselling in North Wales secondary schools from 1965 to the present day

   Awdur: Rees, W. D. C., 1981

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

6. 1980
7. Invasion of host tissue by infective larvae of Ascaris suum (Goeze, 1782)

   Awdur: Arene, F. O. I., Tach 1980

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

8. The distribution and biodegradation of urea in costal waters

   Awdur: Turley, C. M., Awst 1980

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

9. Functional analyses of reading and short-term memory in dyslexic children.

   Awdur: Ellis, N. C., Ebr 1980

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

10. Food selection by the rabbit.

    Awdur: Soane, G. A., Ion 1980

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

11. Studies on plant-animal interactions : Terrestrial molluscs and their food plants.

    Awdur: Minjarez, R. D., Ion 1980

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

12. Human operant behavior: determinants of human fixed-interval performance.

    Awdur: Bagshaw, M., 1980

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth