000 00269nam a2200109Ia 4500
008 240531s9999 xx 000 0 und d
082 _a371 3 RIC
100 _aRICHMOND,W
245 4 _aThe concept of educational technology
260 _aWedefield
_b1970
942 _cANF
999 _c325778
_d325778