000 00279nam a2200109Ia 4500
008 200527s9999||||xx |||||||||||||| ||und||
082 _a618.928 588 DOU H
100 _aDouglas, C.P. , Holt, K.S.
245 0 _aMental Retardation
264 _bAllyn and Bacon
_c1972
300 _a64p.
999 _c15540
_d15540