1. 2004
2. The catchment scale spatiotemporal dynamics and fate of dissolved organic and inorganic matter in the River Conwy, North Wales.

   Evans, D. W. (Awdur), Williams, P. (Goruchwylydd), Thomas, D. (Goruchwylydd) & Bowers, D. (Goruchwylydd), 2004

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

3. 2003
4. Hydrocarbon-degradation by bacteria from Antarctica

   Stallwood, B. (Awdur), Williams, P. (Goruchwylydd), Meh 2003

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

5. 2000
6. Variations of alkalinity in the Northeast Atlantic

   Muller, K. (Awdur), Williams, P. (Goruchwylydd), Ion 2000

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

7. 1999
8. Methane in two temperate coastal marine environments

   Heckers, A. H. A. (Awdur), Williams, P. (Goruchwylydd), 1999

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth