000 00299nam a2200097Ia 4500
008 120224s9999 xx 000 0 und d
082 _a371.394
_bSOR
100 _aSorenson, Juanita, S.
245 _aUnit leader and individually guided education
260 _bAddison-Wesley
_aReading. Mass.,
_c1976
999 _c139353
_d139353