00313nam a2200121Ia 450000500170000000800410001704100080005808200150006610000170008124500390009826000450013730000090018220260720174745.0260720s2008    xx            000 0 und d  aeng  a370.1 AGGT  aAggarwal J C  aTheory and principles of education  aNoida (UP)bVikas Publishing Housec2008  a461p