Cyfyngwch eich canlyniadau yn ôl:
- Pob un
- Vaughan, Irene 1890-1993, 3 canlyniadau
- Benoit, Peter Michael, 1931- -- Correspondence., 3 canlyniadau
- Vaughan, Irene, 1890-1993 -- Correspondence., 3 canlyniadau
- Vaughan, H.R.H. 1893-1978, 2 canlyniadau
- Chater, A. O., 2 canlyniadau
- Chater, A. O. -- Correspondence., 2 canlyniadau
- Evans, Evan Price, 1880-1959, 2 canlyniadau
- Ratcliffe, Derek, 1929- -- Correspondence., 2 canlyniadau
- Ratcliffe, Derek, 1929-, 2 canlyniadau
- Evans, Evan Price, 1880-1959 -- Correspondence., 2 canlyniadau
- Pob un
- Botany -- Wales, 1 canlyniadau
- Naturalists -- Wales, 1 canlyniadau
- Forests and forestry -- Wales, 1 canlyniadau
- Geology -- Wales, 1 canlyniadau
- Mountain ecology -- Wales -- Cader Idris., 1 canlyniadau
- Mountain ecology -- Wales -- Plynlimon., 1 canlyniadau
- Mountain ecology -- Wales -- Snowdonia., 1 canlyniadau
- Mountain ecology -- Wales, South., 1 canlyniadau
- Forest conservation -- Wales., 1 canlyniadau
- Forest ecology -- Wales., 1 canlyniadau
