000			00326nam a22001217a 4500
082			_a153.1 _bSPE
100			_aSpence, Kenneth M.
245			_aBehaviour theory and conditioning / _cby Kenneth W Spence.
260			_aNew Haven : _bYale university press, _c1956.
300			_a262p.:
650			_aBehavior theory
942			_cBK
999			_c499851 _d499851