Não informado. (1992). Journal of Agricultural and Resource Economics. Western Agricultural Economics Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Journal of Agricultural and Resource Economics. Bozeman, Mont: Western Agricultural Economics Association, 1992.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Journal of Agricultural and Resource Economics. Western Agricultural Economics Association, 1992.
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