000 00526nam a2200157 a 4500
041 _aeng
082 _a300.1
_bN14s77
100 _aNagel, Ernest
245 _aThe structure of science
_bproblems in the logic of scientific explanation
260 _aNew York
_bHarcourt
_bBrace
_c1961
300 _a618 p
650 _aCIENCIAS SOCIALES
650 _aFILOSOFIA
942 _cBK
999 _c3095
_d3095