"802919AI (R00349) 6-02." Relief shown by shading and spot heights. Depths shown by shading. Available also through the Library of Congress Web site as a raster image.
United States. Central Intelligence Agency
2002
<a rel="nofollow" class="external free" href="https://www.loc.gov/item/2003626091/">https://www.loc.gov/item/2003626091/</a>