"*GPO: 1991--281-950/40003." Panel title. Alternate title: Amistad Recreation Area. Includes location map. Text and ill. on verso. Available also through the Library of Congress Web site as a raster image.
United States. National Park Service
1991
<a rel="nofollow" class="external free" href="https://www.loc.gov/item/91682393/">https://www.loc.gov/item/91682393/</a>