Cyfyngwch eich canlyniadau yn ôl:
- Pob un
- Vaughan, H.R.H. 1893-1978 -- Correspondence, 3 canlyniadau
- Vaughan, H.R.H. 1893-1978, 2 canlyniadau
- Williams, Kyffin, 1918-2006, 1 canlyniadau
- Salmon, H. Morrey (Harry Morrey), 1 canlyniadau
- West Wales Field Society, 1 canlyniadau
- Salmon, H. Morrey (Harry Morrey) -- Correspondence, 1 canlyniadau
- Ingram, G.C.S. (Geoffrey Cheselden S.), 1881-1971, 1 canlyniadau
- Richards, Mary, 1885-1977, 1 canlyniadau
- Vaughan, Irene, 1890-1993 -- Correspondence, 1 canlyniadau
- Vaughan, Irene 1890-1993, 1 canlyniadau
- Pob un
- Red kite -- Wales, 6 canlyniadau
- Natural history -- Wales -- Snowdonia, 1 canlyniadau
- Bogs -- Wales, 1 canlyniadau
- Birds -- Africa, 1 canlyniadau
- Garden ecology -- Wales, 1 canlyniadau
- Moors (Wetlands) -- Wales, 1 canlyniadau
- Birds -- Conservation, 1 canlyniadau
- Plants -- Wales -- Identification, 1 canlyniadau
- Plant species diversity -- England -- Shropshire Union Canal, 1 canlyniadau
- Vegetation surveys -- Wales., 1 canlyniadau