Ottmers, Donald D. Intensive Survey of Sulphur River Segment 0303: August 13-17, 1984, report, June 1986; (https://texashistory.unt.edu/ark:/67531/metapth1623263/m1/16/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .

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