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SCHULTZ H, 1933, J POLITICAL EC, V41, P478
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[No title captured]
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1932, NEW METHODS MEASURIN
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1932, J POLITICAL EC, V40, P577
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1892, MATH INVESTIGATIONS
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1935, ECONOMETRICA, V3, P66
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1918, THEORY EARNED UNEARN
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1931, J SOCIAL PSYCHOL, V2, P151