Não informado. (1920). Journal of the Department of Agriculture of the Union of South Africa. Union of South Africa, Department of Agriculture.
Citace podle Chicago (17th ed.)Não informado. Journal of the Department of Agriculture of the Union of South Africa. Pretoria, Africa do Sul: Union of South Africa, Department of Agriculture, 1920.
Citace podle MLA (8th ed.)Não informado. Journal of the Department of Agriculture of the Union of South Africa. Union of South Africa, Department of Agriculture, 1920.
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