00590nam a2200253Ia 4500008004000000041000800040082001700048100002000065245008100085250000500166260004400171300001100215650000800226650001400234650000700248650001100255650001400266650000700280650001300287650001300300650000900313650000800322650000600330210210b1967   xxu||||| |||| 00| 0 eng d  aeng  a541.224 PAUN  aPAULING (Linus)  aNature of the chemical bond and the structure of molecules and crystals Ed 3  a  aN DbOxford & IBH Publishing Co.,c1967  axx,644  athe  astructure  aof  aNature  amolecules  aEd  acrystals  achemical  abond  aand  a3