Ehman, Lee. Toward effective instruction in secondary social studies [by] Lee Ehman, Howard Mehlinger [and] John Patrick. - Boston Houghton Mifflin [1974] - xiv, 458 p. illus. 25 cm. 920518 Includes bibliographies. ISBN: 0395176255 LCCN: 73011769 Subjects--Topical Terms: Social sciences--Study and teaching (Secondary) LC Class. No.: H62 / .E44 Dewey Class. No.: 300/.7/12