Brown, Walter. Providing for Backyard Wildlife, A Do-It-Yourself Guide for Feeders, Houses and Plants, pamphlet, September 2011; (https://texashistory.unt.edu/ark:/67531/metapth542225/m1/1/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .