English Sparrow Control., book, April 1931; (https://digital.library.unt.edu/ark:/67531/metadc1543/m1/1/: accessed April 19, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .
English Sparrow Control., book, April 1931; (https://digital.library.unt.edu/ark:/67531/metadc1543/m1/1/: accessed April 19, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .