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100 | _aLLOYD, LEWIS E. | ||
245 | 0 | _aTECHNIQUES FOR EFFICIENT RESEARCH | |
250 | _a1ST ED. | ||
260 |
_aEstados Unidos _bCHEMICAL PUBLISHING _c1966 |
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260 | _aNEW YORK | ||
300 | _a215 | ||
650 | _aTECNICAS DE INVESTIGACION | ||
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