000 00298nam a2200121Ia 4500
100 _aPackham, Deepak (ed)
020 _a0-273-36132-5
942 _cBK
245 _aAspects of educational technology
260 _aPitman Publishing, London
_c 1971
082 _a371.3 Pac/Vol.5
300 _aviii, 488
999 _c9546
_d9546