000 00272nam a22000977a 4500
008 150825b xxu||||| |||| 00| 0 eng d
082 _a371.92 PER
100 _aPERRY NATALIE
245 _aTEACHING THE MENTALLY RETERDED CHILD
260 _aNEW YORK
_bCOLUMBIA UNIVERSITY PRESS
_c1960
999 _c699
_d699