Daubney, R.; Pan-African Agricultural and Veterinary Conference (1929 : Pretoria, South Africa); Walter, A.(Union of South Africa, Dept. of Agriculture; Pretoria : University of Pretoria, Dept. of Library Services (Digital publisher), 1930)
Daubney, R.; Pan-African Agricultural and Veterinary Conference (1929 : Pretoria, South Africa)(Union of South Africa, Dept. of Agriculture; Pretoria : University of Pretoria, Dept. of Library Services (Digital publisher), 1930)