Ashtola Quadrangle


Geological Survey (U.S.). Ashtola Quadrangle, Map, 2010; digital image, ( : accessed October 31, 2014), University of North Texas Libraries, The Portal to Texas History,; crediting UNT Libraries Government Documents Department, Denton, Texas.

Note: Inconsistencies in capitalization and punctuation within the Portal may affect this citation. Before using this citation in formal writing, please consult your preferred style manual. More information.