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Ingram, James C.. (1966). International economic problems . New York: John Wiley n Sons.

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Ingram, James C.. International economic problems. New York: John Wiley n Sons, 1966. Text.

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Ingram, James C.. International economic problems. New York: John Wiley n Sons, 1966. Text.

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Ingram, James C.. International economic problems. New York: John Wiley n Sons, 1966. Print.