000			00624nam a2200193Ia 4500
008			160608s9999 xx 000 0 und d
100			_aDuggal, Janak, ed _999291
100			_aGoyal, J C, ed _999292
245			_aResearch in classroom
245			_breports of experiments and projects
260			_aNew Delhi
260			_bNational council of educational research and training
260			_c1972
300			_av,3 ; v,130p.; 18cm.
650			_aEducation - classroom - research _999293
650			_aImproving learning _999294
650			_aPeriatical examinations _999295
650			_aTeaching general science _999296
999			_c44518 _d44518