00301nam a2200121Ia 450000500170000000800410001704100080005808200150006610000150008124500310009626000430012730000090017020260720174819.0260720s2014    xx            000 0 und d  aeng  a930.7 RUHT  aS.P.Ruhela  aTeaching of Social Studies  aNew DelhibNeelkamal Publicationc2014  a448p