Pond, George M., Salee, George A. 1931.An Economic Study of Crop Production in the Red River Valley of Minnesota. Saint Paul, MN:University of Minnesota, Agricultural Experiment Station. Bulletin 282.
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Pond, George A.; Sallee, George A.; Crickman, C.W..
An Economic Study of Crop Production in the Red River Valley of Minnesota.
University of Minnesota Agricultural Experiment Station.
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