Relief shown by shading. Also shows numbered points of interest. Panel title. Includes text, 9 ancillary trail maps, location map, ill., and advertisement. Text, trail descriptions, and ill. on verso. Available also through the Library of Congress Web site as a raster image.
United States. Department Of The Interior. Southwestern Pennsylvania Heritage Preservation Commission
1998
<a rel="nofollow" class="external free" href="https://www.loc.gov/item/98689330/">https://www.loc.gov/item/98689330/</a>