000 00291nam a2200133Ia 4500
008 160316s1961 xxu||||| |||| 00| 0 eng d
020 _a
100 _aC.A. Coulson
245 _aValence
250 _a2ND
260 _aLONDON
_bOXFORD UNIVERSITY PRESS
_c1961
300 _a406
700 _a
_a
999 _c29684
_d29684