Psychological Data in Business Cycle Research : Sonderdruck aus: The American Journal of Economics and Sociology, Vol. 12, 1952-53, No. 1, pp. 11-22.
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Psychological Data in Business Cycle Research. : Sonderdruck aus: The American Journal of Economics and Sociology, Vol. 12, 1952-53, No. 1, pp. 11-22.
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