Sudan : a country study /
Federal Research Division, Library of Congress ; edited by Helen Chapin Metz.
- 4th ed.
- Washington, D.C. : Federal Research Division, Library of Congress : For sale by the Supt. of Docs., U.S. G.P.O., 1992.
- xxxiii, 336 p. : ill., maps ; 24 cm.
"Research completed June 1991." Supersedes the 1982 ed. of Sudan : a country study, edited by Harold D. Nelson.