Hardy, Thomas B., Dr. Evaluation of Gage Based Cross Section Data to Represent Habitat Conditions for Riverine Resources at the Reach Level, report, May 10, 2015; (https://texashistory.unt.edu/ark:/67531/metapth838905/m1/1/: accessed April 20, 2019), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .