Não informado. (1960). Oklahoma current farm economics. Oklahoma Agricultural Experiment Station.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Oklahoma Current Farm Economics. Stillwater, Okla: Oklahoma Agricultural Experiment Station, 1960.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Oklahoma Current Farm Economics. Oklahoma Agricultural Experiment Station, 1960.
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