LITERATURE
- “Western New York State Egg Laying Test”, September, 1943, and September, 1945.
- “Who's Who in U.S. Egg Laying Tests”, 1945–1946.
- “The Journal of the Department of Agriculture”, Victoria, May, 1941.
- De Beer, J. A., Central Egg Laying Competition at Glen, Farming in South Africa, September, 1945.
- Olivier, L. C., Fourth Central Egg-Laying Competition, Farming in South Africa, September, 1930.
- Du Plessis, P. H. C., High Egg-Laying Records in Central Competition at Glen, Farming in South Africa, July, 1945.