Welton, David A. Children and Their World: Strategies for Teaching Social Studies / Welton, David A. & John T. Mallan - Boston : Houghton Mifflin Company , 1981. - 492 p. ; : ill. , 23 cm. Include Bibliographical References & Index. ISBN: 0395307694 Subjects--Topical Terms: Young People in the World Dewey Class. No.: 305.23 / WEC 1981