000 00280nam a2200109Ia 4500
008 230210s9999 xx 000 0 und d
100 _aKumar, J.
_919235
245 0 _aEffectiveness of distance Education system
260 _bDPH New Delhi
_c1998
300 _a143
942 _cBK
999 _c118939
_d118939