Não informado. (1993). Journal of Agricultural and Applied Economics. Southern Agricultural Economics Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Journal of Agricultural and Applied Economics. Auburn, Ala: Southern Agricultural Economics Association, 1993.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Journal of Agricultural and Applied Economics. Southern Agricultural Economics Association, 1993.
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