1800. Hall, Sidney. Cartographic Details: Scale approximately 1:6,336,000. Relief shown by hachures. Inset: Singapore."XXXIX."--Lower right margin. 57 x 42 centimeters... A & C Black; Edinburgh.
1947. Schultz, Kenneth A. This polygon shapefile represents areas that were the subject of interstate territorial disputes between 1947 and 2000. The disputed areas referenc... Stanford Digital Repository.