Não informado. (1971). South African journal of animal science. South African Society of Animal Production.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. South African Journal of Animal Science. Pretoria, Africa do Sul: South African Society of Animal Production, 1971.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. South African Journal of Animal Science. South African Society of Animal Production, 1971.
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