United States. Army Map Service. Great Britain. War Office. General Staff. Geographical Section. G.S.G.S. no. 4275. In upper left margin "Algeria". Relief shown by 10 meter contour intervals, hachures, and spot elevations. Authorities: Intelligence information, 1941-42; Beni-saf 1:50,000, Service Geographique de l'Armee, 1912. In lower right margin: "Drawn by War Office, 1942".