Não informado. (1952). Marketing Research Report. U.S. Department of Agriculture, Bureau of Agricultural Economics.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Marketing Research Report. Washington: U.S. Department of Agriculture, Bureau of Agricultural Economics, 1952.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Marketing Research Report. U.S. Department of Agriculture, Bureau of Agricultural Economics, 1952.
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