000 00401nam a2200145Ia 4500
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082 _223
_a540 LES
100 _aLessing, Lawrence P.
245 0 _aUnderstanding chemistry
_c/ Lawrence P. Lessing
260 _aLondon
_bGEOGE G. HARRAP & CO. LTD
_c, 1961
300 _a192p
_c; 24 cm.
650 _aChemistry
942 _cRBK
999 _c67017
_d67017