Cyfyngwch eich canlyniadau yn ôl:
- Pob un
- Vaughan-Thomas, Wynford, 1908-1987, 5 canlyniadau
- Bush, Duncan, 2 canlyniadau
- Dearnley, Moira, 2 canlyniadau
- Jenkins, Mike, 1953-, 2 canlyniadau
- Williams-Ellis, Clough, 1883-1978, 1 canlyniadau
- Lloyd George, Megan, 1902-1966, 1 canlyniadau
- Jones, Glyn, 1905-1995, 1 canlyniadau
- Garlick, Raymond, 1 canlyniadau
- Jenkins, Nigel, 1949-2014, 1 canlyniadau
- Jones, Gwyn, 1907-1999, 1 canlyniadau
- Pob un
- Environmental protection -- Wales, 1 canlyniadau
- Memorials -- Wales -- Dylife, 1 canlyniadau
- Landscape protection -- Wales, 1 canlyniadau
- Regional planning -- Wales, 1 canlyniadau
- Applied ecology -- Wales, 1 canlyniadau
- Economic development -- Environmental aspects -- Wales, 1 canlyniadau
- Environmental monitoring -- Wales, 1 canlyniadau