Maentwrog: Fungi Math Eitemau Uwchlwytho gan 'A Dedicated Naturalist', the Mary Gillham Archive Project
Maentwrog: Invertebrate & Lepidoptera Math Eitemau Uwchlwytho gan 'A Dedicated Naturalist', the Mary Gillham Archive Project
Maentwrog: Plant/tree & Moss Math Eitemau Uwchlwytho gan 'A Dedicated Naturalist', the Mary Gillham Archive Project
TOMEN-Y-MUR, POSSIBLE ANNEX ON NW (EXTRA-MURAL FEATURES TO NW) Math Eitemau Uwchlwytho gan Comisiwn Brenhinol Henebion Cymru
