Soil map, Texas, Camp County sheet
United States. Bureau of Soils.. Soil map, Texas, Camp County sheet, Map, June 17, 1910; digital image, (http://texashistory.unt.edu/ark:/67531/metapth19738 : accessed November 22, 2009), University of North Texas Libraries, The Portal to Texas History, http://texashistory.unt.edu; crediting University of North Texas Libraries, Denton, Texas.