00327nam a22001097a 4500020001800000082001500018100001600033245005500049260004800104300003700152650002800189  a9788120330559  a370.15 MAN  aMangal, S K  aEssentials of educational psychology /cS K Mangal  aNew Delhi :bPHI Learning Pvt. Ltd.,cc2007  ax, 726 pages illustrations 24 cm  aEducational Psychology