Tongwynlais: Bacteria & Thistle Math Eitemau Uwchlwytho gan 'A Dedicated Naturalist', the Mary Gillham Archive Project
Gwaelod-y-Garth: Landscape & Bacteria Math Eitemau Uwchlwytho gan 'A Dedicated Naturalist', the Mary Gillham Archive Project
Penderyn: Bacteria & Invertebrate Math Eitemau Uwchlwytho gan 'A Dedicated Naturalist', the Mary Gillham Archive Project
Standards for raw and pasteurised milk from the Ministry of Health, 1923 Math Eitemau Uwchlwytho gan Helen Rowe
