000 00285nam a2200121Ia 4500
100 _aRichmond, W. Kenneth; Ed.
942 _cBK
654 _a
245 _aConcept of educational technology
260 _aLondon
_bWeidenfeld & Nicolson
_c1970
082 _a371.394
300 _a(8),254
999 _c418322
_d418322
041 _aeng