000 00288nam a2200097Ia 4500
008 120229s9999 xx 000 0 und d
082 _a374.4 SID
100 _aSiddique, Mujibul Hasan
245 _aDistance education: theory and research
260 _bA.P.H. Publishing
_aNew Delhi
_c2007
999 _c125347
_d125347