Não informado. (1962). South African Forestry Journal. South African Forestry Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. South African Forestry Journal. Pretoria, Africa do Sul: South African Forestry Association, 1962.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. South African Forestry Journal. South African Forestry Association, 1962.
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