00310nam a2200121Ia 450000500170000000800410001704100080005808200160006610000180008224500410010026000380014130000090017920260720174637.0260720s2006    xx            000 0 und d  aeng  a370.15 AGGE  aAggarwal, J C  aEssentials of educational psychology  aNew DelhibVikas Publishersc2006  a581p