Grange, Wallace B. (Wallace Byron), 1905-1987 & McAtee, W. L. (Waldo Lee), 1883-1962. Improving the Farm Environment for Wild Life, pamphlet, 1934; (https://digital.library.unt.edu/ark:/67531/metadc97259/m1/1/: accessed October 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .