000 00325nam a2200121Ia 4500
008 240112s9999 xx 000 0 und d
082 _aCRA-E
_b500
100 _aCraig, Gerald S; Hurley, Beatrice Davis
245 0 _aExploring in science
260 _a New York
_bGinn & Company
_c1950
650 _aPure sciences
942 _cBK
999 _c15121
_d15121