Rommel, George M. (George McCullough) & Ashbrook, F. G. (Frank Getz), 1892-. Swine Management, pamphlet, 1917; (https://digital.library.unt.edu/ark:/67531/metadc96513/m1/1/: accessed October 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .