Não informado. (1911). Agricultural journal of the Union of South Africa. Department of Agriculture.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Agricultural Journal of the Union of South Africa. Pretoria, Africa do Sul: Department of Agriculture, 1911.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Agricultural Journal of the Union of South Africa. Department of Agriculture, 1911.
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