Halcrow, H. G. (1953). Agricultural policy of the United States. Prentice-Hall.
Dyfyniad Arddull ChicagoHalcrow, Harold G. Agricultural Policy of the United States. New York: Prentice-Hall, 1953.
Dyfyniad MLAHalcrow, Harold G. Agricultural Policy of the United States. Prentice-Hall, 1953.
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