The democratic republic of Sudan and adjacent areas: geological map /
Vail, J. R.
[Tolworth] : Directorate of Overseas Surveys,
[1974]
D.O.S. 1203 A, B.
Topographic base prepared from Africa 1:2,000,000 series 2201.
With: Overseas geology and mineral resources, no. 49: - Outline of the geology and mineral deposits of ... the Sudan ... [By] J.R. Vail.