000 00325nam a22001217a 4500
082 _a500
_bOPP
100 _aThe Open University
_91081
245 _aThe periodic table and chemical bonding
260 _aMilton Keynes
_bThe Open University
_c1971
300 _a48p.
650 _aScience-Study and teaching
_921126
942 _cBK
999 _c65126
_d65126