000 00250nam a22001097a 4500
020 _a0136638236
082 _a501
_bCAR.P
100 _aCARL G HEMPEL
245 _aPHILOSOPHY OF NATURAL SCIENCE
260 _aLONDON
_bPRENTICE HALL
_c1966
942 _cBK
999 _c472380
_d472380