000 003010000a22001210004500
245 _aChemical constitution : an introduction to the theory of bond
100 _aKetelaar, J.A.A.
260 _aNew York
_bElsevier
_c1953
300 _a398 p.
080 _a541.57
_bK4
041 _aEN
942 _cBK
999 _c52132
_d52132