000			00385nam a2200157Ia 4500
008			180613s9999||||xx |||||||||||||| ||und||
020			_a408709227
041			_aen
082			_a541.224
100			_aCARTMELL, E.
245		0	_aValency and molecular stucture
250			_a4th
260			_aLondon _bThe english language book soc _ciety 1979
300			_a341p.
942			_cSR
999			_c83694 _d83694