Teaching science through discovery [by] Arthur A. Carin [and] Robert B. Sund. Carin, Arthur A. Sund, Robert B., joint author. Science Study and teaching (Elementary) LB1585 .C28 1970 507 CAT Includes bibliographical references. Columbus, Ohio, C. E. Merrill Pub. Co. [1970] [1970] 1970 Text 625 p. eng