00298nam a2200121Ia 450000500170000000800410001704100080005808200150006610000150008124500230009626000480011930000090016720260720174601.0260720s2006    xx            000 0 und d  aeng  a374.1 SIND  aSingh, U K  aDistance education  aNew DelhibDiscovery Publishing Housec2006  a329p