00403nam a2200169Ia 4500003000400000005001700004008004100021020001800062040000700080041000800087082001600095100001700111245003700128260004500165300000900210650001400219OSt20250930121620.0250729s2005    xx            000 0 und d  a9788171697427  cAL  aeng  a311.22 PRAP  aPrakash Ravi  aProblems of educational research  aNew DelhibCommonwealth Publishersc2005  a446p  aEducation