000 00288nam a2200121Ia 4500
100 _aMohanty, Jagannath
020 _a81-7100-388-5
942 _cBK
245 _aEducational technology
260 _aDeep & Deep Publications, New Delhi
_c1992
082 _a371.3 Moh
300 _aviii, 302
999 _c62351
_d62351