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