Skeel, Dorothy J. The challenge of teaching social studies in the elementary school / by Dorothy J. Skeel, with assistance from Ronald E. Sterling - 3d ed. - Santa Monica, Ca. : Goodyear, 1979 - xiv, 300 p. : ill. ; 24 cm. ISBN: 0876201508 LCCN: 79-011315 Subjects--Topical Terms: Social sciences--Study and teaching (Elementary)