Não informado. (1954). Papua New Guinea Agricultural Journal. Department of Agriculture.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Papua New Guinea Agricultural Journal. Port Moresby: Department of Agriculture, 1954.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Papua New Guinea Agricultural Journal. Department of Agriculture, 1954.
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