00294nam a2200133Ia 45000030006000000080041000060400015000471000017000622450032000792500011001112600009001225460012001310050017001430STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aPaccling, L.  aNature of the chemical bond  aSecond  c1948  aEnglish20220125170236.0