Creosote: What Is It? What are the Risks?
Creosote: What Is It? What are the Risks?, pamphlet, 2002; Austin, TX. (texashistory.unt.edu/ark:/67531/metapth654673/: accessed September 25, 2018), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; crediting UNT Libraries Government Documents Department.