000 00288nam a2200121Ia 4500
008 200906s9999 xx 000 0 und d
082 _a541.396 S568
100 _aSIDGWICK,N.V
245 0 _aELECTRONIC THEORY OF VALENCY
260 _bO.U.P, LONDON
_c1953
300 _a23X15
942 _cBK
999 _c61206
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