TY - BOOK AU - Aggarwal, I P TI - Theory into practice : Advance organizer model and concept attainment model in teaching of chemistry : Orientation programme cum workshop (first phase) 16-21 August, 1988; (Second U1 - 540.7 THE PY - 0000///199 CY - Bhopal PB - Regional College of Education, N.C.E.R.T. KW - Chemistry ER -