Clawson, M. (1971). Policy directions for U.S. agriculture; long-range choices in farming and rural living. Allied.
Chicago-tyylinen lähdeviittausClawson, Marion. Policy Directions for U.S. Agriculture; Long-range Choices in Farming and Rural Living. Bombay: Allied, 1971.
MLA-viiteClawson, Marion. Policy Directions for U.S. Agriculture; Long-range Choices in Farming and Rural Living. Allied, 1971.
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