00432nam a22001457i 4500001001000000005001700010008004100027082002300068100001600091245004900107250001000156260004700166300001700213650005600230SXC01300920260819093535.0260101s1959    ii            000 0 eng d  a541.224 PAL-V2222  aPalmer, W G10aValency: Classical and modern /cPalmer, W G  a2 ed.  abCambridge University Pres, London,c1959  ap. ;c22 cm. 0aMolecular bonds and valances; Theoretical chemistry