Não informado. (1949). Progressive agriculture in Arizona. University of Arizona, College of Agriculture.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Progressive Agriculture in Arizona. Tucson, Ariz: University of Arizona, College of Agriculture, 1949.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Progressive Agriculture in Arizona. University of Arizona, College of Agriculture, 1949.
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