• Annual Reports of the Librarian to the State Board of Regents.
  • Dictionary of American Library Biography, Libraries Unlimited, 1978.
  • Draegert, Eva E.  Some Statistical and Interpretative Data Concerning the Faculty of the State University of Iowa 1847-1916.  M.A. thesis, University of Iowa, 1936.
  • Gerber, John C., A Pictorial History of the University of Iowa, Iowa City: University of Iowa Press, 1988.
  • Gue, Benjamin F.  History of Iowa From the Earliest Times to the Beginning of the Twentieth Century.  Vol. IV.
  • Hawkeye Library Notes, 1937-1946
  • Hawkeye Yearbooks
  • Newsletter:  The University of Iowa Libraries, especially 8(1); 8(2); 8(3); 9(1); 9(2); 9(3); 10(1); 10(2); 11(2); 13(1);
  • Pearson, Stow, Ralph Ellsworth and the University of Iowa Libraries, Books at Iowa 49: (November 1988) 7-15.
  • Special Collections/University Archives, University of Iowa Libraries.
  • Throne, Mildred. The History of the State University of Iowa: The University Libraries.  M.A. thesis, University of Iowa, 1943.
  • University of Iowa News Bulletin, 1926-1934
  • Vidette-Reporter, 1869-1884.