000			00397nam a2200145Ia 4500
008			211109s9999||||xx |||||||||||||| ||und||
082			_a156.3 _bPEN-M
100			_aPenrose, Lionel S
245		0	_aMental Defect
260			_bMacmillan _aLondon _c1951
300			_a183p.
630			_xGeneral Stack
650			_aPhilosophy & psychology _vpsychologyComparative psychology _xZoology
942			_cBOOK
999			_c16156 _d16156