Gregg, Richard B. Preparation for science / Richard B. Gregg. - 1st ed. - Ahmedabad : Gujarat Vidyapith, 1959. - xii, 111 p. ; 21 cm. ISBN: [N.A.] : Re. 1/- Subjects--Topical Terms: Science--Study and teaching.Science education. Dewey Class. No.: T 501