"801408 (AO1867) 10-89." Covers the area from Mandalay, Burma eastward to Wuzhou, China and from the west section of Yangtze River southward to northern parts of Malaysia and Indonesia. Available also through the Library of Congress Web site as a raster image.
United States. Central Intelligence Agency
1989
<a rel="nofollow" class="external free" href="https://www.loc.gov/item/2005631512/">https://www.loc.gov/item/2005631512/</a>