Coppock, J. O. (1963). North Atlantic policy: The agricultural gap. Twentieth Century Fund.
Dyfyniad Arddull ChicagoCoppock, John O. North Atlantic Policy: The Agricultural Gap. New York: Twentieth Century Fund, 1963.
Dyfyniad MLACoppock, John O. North Atlantic Policy: The Agricultural Gap. Twentieth Century Fund, 1963.
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