Não informado. (1961). Forestry in South Africa. Department of Forestry.
Citace podle Chicago (17th ed.)Não informado. Forestry in South Africa. Pretoria, Africa do Sul: Department of Forestry, 1961.
Citace podle MLA (8th ed.)Não informado. Forestry in South Africa. Department of Forestry, 1961.
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