Armstrong, J. K. The Farmers Union Advocate (Guthrie, Okla.), Vol. 5, No. 14, Ed. 1 Thursday, April 21, 1910, newspaper, April 21, 1910; (https://gateway.okhistory.org/ark:/67531/metadc98656/m1/1/: accessed October 20, 2018), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .