Hurd, Paul DeHart New directions in elementary science teaching [by] Paul DeHart Hurd [and] James Joseph Gallagher. - Belmont, Calif. Wadsworth Pub. Co. [1968] - 166 p. illus. 22 cm. - Wadsworth guides to science teaching . Bibliography: p. 135-145. LCCN: 68018372 Subjects--Topical Terms: Science--Study and teaching (Elementary) LC Class. No.: LB1585 / .H8 Dewey Class. No.: 372.3/5