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| 037 | _cGeneral Book | ||
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_aRTL _cRTL _beng |
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| 041 |
_2eng _aeng |
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| 082 | _axb4.73.N77t, L7 | ||
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_aNATIONAL BUREAU OF ECONOMIC RESEARCH INC _9321478 |
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| 245 | 0 |
_aInteraction in economic research _b57th annual report |
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| 260 |
_aNew York _bNber _c1977 |
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| 300 |
_a111p _ccm. |
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| 700 |
_aNATIONAL BUREAU OF ECONOMIC RESEARCH INC _9321479 |
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| 942 |
_hxb4.73.N77t, L7 _cGB _2CC |
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_c630365 _d630365 |
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