Gulley, Halbert E. Discussion, conference, and group process / [by] Halbert E. Gulley. - 2d ed. - New York : Holt, Rinehart and Winston, [1968]. - x, 374 p. : illus. ; 24 cm. Third ed. (c1977) published under title: Communication and group process. Includes bibliographies. LCCN: 68016785 Subjects--Topical Terms: Interpersonal communication.Small groups. LC Class. No.: LC6519 / .G84 1968 Dewey Class. No.: 374.22 / GUD 1968