Oslo Posten. (Guymon, Okla.), Vol. 1, No. 17, Ed. 1 Friday, December 16, 1910, newspaper, December 16, 1910; (https://texashistory.unt.edu/ark:/67531/metapth635732/m1/1/: accessed July 6, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .