Correspondence relating to the visit of the Queen, 8 Aug. Ychwanegu i'r clipfwrdd B. Is-fonds 1955. Rhan oWelsh Plant Breeding Station (WPBS) Archives,
Administration etc. Ychwanegu i'r clipfwrdd C. Is-fonds 1912-1983. Rhan oWelsh Plant Breeding Station (WPBS) Archives,
Cahn Hill Improvement Scheme, Ychwanegu i'r clipfwrdd D. Is-fonds 1903-1958. Rhan oWelsh Plant Breeding Station (WPBS) Archives,
Experiments Ychwanegu i'r clipfwrdd E. Is-fonds 1919-1969. Rhan oWelsh Plant Breeding Station (WPBS) Archives,
General correspondence files Ychwanegu i'r clipfwrdd A. Is-fonds 1950-1979. Rhan oWelsh Plant Breeding Station (WPBS) Archives,