000 00355nam a2200169Ia 4500
008 190201s9999 xx 000 0 und d
020 _a408709227
082 _a546
082 _bC176V
100 _a"Cartmell, E"
245 0 _aValency and Molecular St
250 _aFourth
260 _aLondon
260 _bELBS
260 _c1979
300 _a341
999 _c23841
_d23841