00313nam a2200133 a 450000500170000008200160001710000170003310000180005024500260006826000350009430000230012963000140015263000130016620251203091146.0  a370.72bBES  aBest, John W  aKahn, James V  aResearch in education  aNew DelhibPrentice Hallc1986  a380 p.b22 cm.cPB  aEducation  aResearch