00325nam a2200121Ia 450000500170000000800410001704100080005808200150006610000280008124500470010926000380015630000090019420260720174550.0260720s2004    xx            000 0 und d  aeng  a374.1 SIDD  aSiddiqui, Hasan Mujibul  aDistance lerning technologies in education  aNew DelhibA P H Publishingc2004  a326p