1991. Hema Maps (Firm). Panel title. Relief shown by spot heights. "Printed ... 1991." Includes index and color illustrations. Brisbane : Hema Maps, [1991].
1952. United States. Army Map Service, Harvard University. Center for Geographic Analysis., and East View Cartographic, Inc. This layer is a georeferenced raster image of the Army Map Service (AMS) Series P502, North Africa, 1:250,000 AMS Series sheet map entitled: Ti-n T... Harvard Map Collection, Harvard College Library.