United States. Army Map Service. Great Britain. War Office. General Staff. Geographical Section. G.S.G.S. no. 4241. In upper left margin: Morocco. Relief shown by 10 meter contour intervals, and spot elevations. British Nort West Africa grid. Sources: ceuta, Spanish Morocco 1:50,000, G.S.G.S. 4239, 1941; Guide Maroc, Michelin et cie, Paris, 1939; Admiralty chart no. 2742, 1937; Intelligence information, 1941.