Frederick, Oklahoma

in America: Marx, Jefferson, and Jesus in the Oklahoma Countryside, 1904-1920 (University of Oklahoma Press, 1999). Official site of Christian Socialist

Ynez D.; Historical Atlas of the American West. Norman, OK: University of Oklahoma Press, 1989. Brilliant, Mark and David M. Kennedy, eds. World War II and

  Nolan, Frederick W. The Lincoln County War: A Documentary History. Norman, Oklahoma: University of Oklahoma Press. 1992.  Nolan, Frederick W. The Hunting

Native American Placenames of the United States. Norman, Oklahoma: University of Oklahoma Press. ISBN 0-8061-3576-X. OCLC 53019644. Campbell, Lyle (1997)

(PDF) Online Galleries, History of Science Collections, University of Oklahoma Libraries （页面存档备份，存于互联网档案馆） High resolution images of works by Leonhart