00290nam a2200133Ia 45000030006000000080041000060400015000471000018000622450028000802500010001082600009001185460012001270050017001390STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aPauling Linus  aNature of chemical bond  aThird  c1963  aEnglish20220125170308.0