000 00305nam a2200109Ia 4500
008 200527s9999||||xx |||||||||||||| ||und||
082 _a616.858 8 ELL
100 _aEllis, Norman R.
245 0 _aInternational Review of Research in Mental Retardation
264 _bAcademic Press Inc
_c1966
300 _a366p.
999 _c15006
_d15006