00292nam a2200133Ia 45000030006000000080041000060400015000471000016000622450032000782500010001102600009001205460012001290050017001410STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aPauling, L.  aNature of the chemical bond  aThird  c1975  aEnglish20220125170136.0