Voll, John Obert, 1936- The Sudan : unity and diversity in a multicultural state / John Obert Voll and Sarah Potts Voll. - Boulder, Colo. : Westview Press, 1985. - xiii, 178 p. : ill. ; 24 cm. - Profiles. Nations of the contemporary Middle East . Includes index. Bibliography: p. 161-171. ISBN: 0865313024 : $17.50 LCCN: 84021936 Subjects--Geographic Terms: Sudan. LC Class. No.: DT154.6 / .V65 1985 Dewey Class. No.: 962.4