00414nam a22001337i 4500001001000000005001700010008004100027082002200068100001500090245005600105260004600161300001700207650005600224SXC00085320260819093307.0260101s1961    ii            000 0 eng d  a541.224 BRO-S222  aBrown, G I10aSimple guide to modern valency theory /cBrown, G I  abLongmans Green & Company, London,c1961  ap. ;c22 cm. 0aMolecular bonds and valances; Theoretical chemistry