000 00311nam a2200121Ia 4500
008 220204s9999 xx 000 0 und d
082 _a371.3
_bPER
100 _aELLINGTON, benry
245 0 _aHandbook of educational technology
260 _aLondon
_bKogan Page
_c1984
700 _aPERCIVAL, Fred
942 _cBK
999 _c37787
_d37787