Johnson, David W., 1940- Joining together : group theory and group skills / David W. Johnson, Frank P. Johnson. - 8th ed. - London: Allyn and Bacon, 2003. - xii, 530 p. : ill. ; 24 cm. Includes index and bibliography: (p. 509-521). ISBN: 0205367402 Subjects--Topical Terms: Group theory Dewey Class. No.: 302.3