000 00300nam a2200121Ia 4500
100 _aSahoo, P K
020 _a81-86880-56-9
942 _cBK
245 _aEducational technology in distance education
260 _aAravali Books International, New Delhi
_cc1999
082 _a374.4 Sah
300 _a177
999 _c29769
_d29769