000 00278nam a2200097Ia 4500
008 220204s9999 xx 000 0 und d
082 _a37:65(03)
_bENC
245 0 _aEncyclopedia of educational media communications and technology
260 _aLondon
_bMacmillan
_c1978
942 _cBK
999 _c34966
_d34966