000 00278nam a2200121Ia 4500
100 _aThelen, Herbert A.
942 _cBK
654 _a
245 _aClassroom Grouping For Teachability
260 _aNew York
_bJohn Wiley
_c1967
082 _a371.25
300 _c23.3cm
_axiv,274
999 _c414839
_d414839
041 _aeng