Robinson, E.M.; 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)
Du Toit, P.J.; 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)
Walker, J.; 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)
De Kock, G.; 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)