Não informado. (1947). South African Science. South African Association for the Advancement of Science.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. South African Science. Johannesburg, Africa do Sul: South African Association for the Advancement of Science, 1947.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. South African Science. South African Association for the Advancement of Science, 1947.
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