Não informado. (1911). Agricultural journal of the Union of South Africa. Department of Agriculture.
Chicago-referens (17:e uppl.)Não informado. Agricultural Journal of the Union of South Africa. Pretoria, Africa do Sul: Department of Agriculture, 1911.
MLA-referens (8:e uppl.)Não informado. Agricultural Journal of the Union of South Africa. Department of Agriculture, 1911.
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