Não informado. (1940). Current review of agricultural conditions in Canada. Department of Agriculture.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Current Review of Agricultural Conditions in Canada. Ottawa: Department of Agriculture, 1940.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Current Review of Agricultural Conditions in Canada. Department of Agriculture, 1940.
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