00298nam a2200121Ia 450000500170000000800410001704100080005808200160006610000220008224500250010426000380012930000090016720260720174537.0260720s2005    xx            000 0 und d  aeng  a311.22 KHAE  aKhan, Mohd Sharif  aEducational Research  aNew DelhibA P H Publishingc2005  a207p