Sierra Leone 1:50,000 /
Great Britain.Directorate of Overseas Surveys.
[Tolworth, Eng.] : Directorate of Overseas Surveys,
[1961?- ]
Relief shown by contours and spot heights, and by shading or landforms on some sheets.
Sheets contain boundary diagram, reliability diagram, and index to adjoining sheets.
Various editions.
Standard map series designation: G742.
Graphic index in central file.