00300nam a2200121Ia 450000500170000000800410001704100080005808200150006610000170008124500310009826000400012930000090016920260720174803.0260720s2009    xx            000 0 und d  aeng  a900.7 AGGT  aAggarwal J C  aTeaching of Social Studies  aDelhibVikas Publishing Housec2009  a447p