000 00310nam a2200109Ia 4500
008 220510s1996 xx 000 0 und d
041 _aeng
082 _a371.3078
_bPLO
100 _aPlomp,Tjeerd,
_9773406
245 _aInternational Encyclopedia of Educational Technology
260 _aNew York:
_bPergamon,
_c1996
999 _c523612
_d523612