Não informado. (1968). Canadian agricultural insect pest review. Department of Agriculture, Information Division.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Canadian Agricultural Insect Pest Review. Ottawa: Department of Agriculture, Information Division, 1968.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Canadian Agricultural Insect Pest Review. Department of Agriculture, Information Division, 1968.
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