000 00275nam a22001097a 4500
082 _a539
_bGRA/CHE
100 _aHARRY B GRAY
245 _aCHEMICAL BONDS; AN INTRODUCTION TO ATOMIC AND MOLECULER STRUCTURE
250 _aSECOND
260 _bW A BENJAMIN
_c1973
942 _2ddc
_cBK
999 _c1575
_d1575