000 00312nam a2200121Ia 4500
008 200526s9999||||xx |||||||||||||| ||und||
082 _a371.92 TIZ
100 _aTizard, Jack
245 0 _aMental Retardation: Concepts of Education and Research
264 _bAllyn and Bacon
_c1974
300 _a130p.
942 _c
999 _c11019
_d11019