000 00320nam a2200121Ia 4500
008 211214s9999 xx 000 0 und d
040 _cJayakar Knowledge Resource Centre
100 _aO'connor
245 0 _aSocial problem of mental deficiency
250 _a1st
260 _bPergaman press
_aNew york
_c1956
942 _c1
999 _c58517
_d58517