"Great Britain. D. Survey, War Office and Air Ministry." . . "United States / Corps of Engineers." . . . . . "U.S. Department of Interior. Geological Survey." . . "Great Britain. Directorate of Overseas Survey." . . . . . . . . . . . . . . . "Internationale Weltkarte <1:1000000>" . . . . . . . . . . . . . . . . "Krung Thep (Bangkok)" . . . . . . . "Instituto Geográfico e Cadastral" . . "Institut für Angewandte Geodäsie <Frankfurt, Main>" . . . "Institut Géographiques National" . . "American Geographical Society." . . "Army Map Service" . . "-as Sūdān. Maslahat al-Misāha." . . "1009627-9." . . "Canada / Surveys and Mapping Branch." . . . "Chief of Engineers." . . .