00292nam a2200121Ia 450000500170000000800410001704100080005808200150006610000100008124500510009126000200014230000080016220260720174730.0260720s1998    xx            000 0 und d  aeng  a930.7 IGNT  aIGNOU  aTeaching of social studies:teaching of history  aNew Delhic1998  a50p