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| 024 | _a190560 | ||
| 037 | _cReference Collections | ||
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_aRTL _cRTL _beng |
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| 041 |
_2eng _aeng |
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| 082 | _a"X.1, dN20, K7" | ||
| 110 | _aNATIONAL BUREAU OF ECONOMIC RESEARCH | ||
| 245 | 0 |
_aContributions to economic knowledge research _b 47th Annual report |
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| 260 |
_aNew _bYork The Author |
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| 490 | _v00417178: 1967 (47th) (various pagination) | ||
| 700 | _aNATIONAL BUREAU OF ECONOMIC RESEARCH | ||
| 942 |
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