Cyfyngwch eich canlyniadau yn ôl:
- Pob un
- Roberts, Evan, 1906-1991, 9 canlyniadau
- Chater, A. O., 3 canlyniadau
- Chater, A. O. -- Correspondence., 2 canlyniadau
- Ratcliffe, Derek, 1929- -- Correspondence., 2 canlyniadau
- Ratcliffe, Derek, 1929-, 2 canlyniadau
- Lhuyd, Edward, 1660-1709, 1 canlyniadau
- Salmon, H. Morrey (Harry Morrey), 1 canlyniadau
- Vaughan, H.R.H. 1893-1978, 1 canlyniadau
- Richards, Mary, 1885-1977, 1 canlyniadau
- Benoit, Peter Michael, 1931- -- Correspondence, 1 canlyniadau
- Pob un
- Botany -- Wales, 1 canlyniadau
- Naturalists -- Wales, 1 canlyniadau
- Natural history -- Wales -- Snowdonia, 1 canlyniadau
- Landscape -- Wales -- Snowdonia, 1 canlyniadau
- Naturalists -- Wales -- Autobiography, 1 canlyniadau
- Mountain plants -- Wales -- Snowdonia, 1 canlyniadau
- Geology -- Wales, 1 canlyniadau
- Tourism -- Wales -- Snowdonia, 1 canlyniadau
- Snowdonia (Wales) -- Description and travel, 1 canlyniadau
- Zoology -- Wales, 1 canlyniadau
![[Evan Roberts]](/uploads/r/llyfrgell-genedlaethol-cymru-national-library-of-wales/7/6/9/7699d5f214f99cdb372695b179267b9080bf4076b6e1c5fff3a38dcd320d0e0b/default_142.jpg)
![[Evan Roberts]](/uploads/r/llyfrgell-genedlaethol-cymru-national-library-of-wales/4/2/f/42f665774a2fbe4fb366d9e4bed6ffcc83978a5eb10a0ff9e8417971b19cabeb/default_142.jpg)
![[Evan Roberts]](/uploads/r/llyfrgell-genedlaethol-cymru-national-library-of-wales/a/f/2/af20d039e20afdf38de473d012cc18867f5c58ace6fa50c9f856f03d9759427b/default_142.jpg)
![[Evan Roberts]](/uploads/r/llyfrgell-genedlaethol-cymru-national-library-of-wales/5/5/5/555dc93583cca98de7c18f8bbc1473493e871b1ff5a52ed1a07abe0e36a29ef4/default_142.jpg)
![[Evan Roberts]](/uploads/r/llyfrgell-genedlaethol-cymru-national-library-of-wales/5/2/4/524de757a91e795dda387c1e1ba5541cd4aa8fe27dcac6cc4aa940ab3bebac69/default_142.jpg)