Reconnoissance soil survey of the panhandle region of Texas
Carter, William T. (William Thomas) and United States. Bureau of Soils.. Reconnoissance soil survey of the panhandle region of Texas, Book, October 26, 1911; digital images, (http://texashistory.unt.edu/ark:/67531/metapth19755 : accessed March 20, 2010), University of North Texas Libraries, The Portal to Texas History, http://texashistory.unt.edu; crediting UNT Libraries, Denton, Texas.