000 00254nam a2200109Ia 4500
942 _cBK
654 _a
245 _aOn understanding science
_bAn historical approach
260 _aNew York
_bMentor Book
_c1951
082 _a509
300 _bPb
_c17.5cm
_a144
999 _c346944
_d346944
041 _aeng