00420nam a2200181Ia 4500003000400000005001700004008004100021020001900062040000700081041000800088082001500096100001400111245003600125260003800161300000900199650001300208700001700221OSt20250819122036.0250729s2005    xx            000 0 und d  a978-8176487764  cAL  aeng  a930.7 SINT  aGupta S P  aResearch in teaching of science  aNew DelhibA P H Publishingc2005  a260p  aCommerce  aNaresh Kumar