000 00257nam a22000977a 4500
999 _c5718
_d5718
082 _a371.9 EDU
245 _aThe educationally subnormal :
_bpre and post school needs /
_cNDMHC
260 _aLondon :
_bUniversity of London,
_c1964
300 _a55 p.
942 _cSTS