Não informado. (1919). Memoirs of the Botanical Survey of South Africa. Department of Agricultural Technical Services, Botanical Research.
Citace podle Chicago (17th ed.)Não informado. Memoirs of the Botanical Survey of South Africa. Pretoria, Africa do Sul: Department of Agricultural Technical Services, Botanical Research, 1919.
Citace podle MLA (8th ed.)Não informado. Memoirs of the Botanical Survey of South Africa. Department of Agricultural Technical Services, Botanical Research, 1919.
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