Secondary sources are materials written by historians using primary sources (such as government reports, newspaper articles, memoirs, etc.) Examples of secondary sources include books, journal articles, and encyclopedia articles. For more information on secondary sources, see this guide.

See also this guide on the history of the University of Oklahoma.

To search for books on the history of Oklahoma, use the Local Catalog, which lists materials owned by the University of Oklahoma Libraries.

Many cities and counties have written their histories. These can be good secondary resources, and occasionally these may serve as primary resources if they include first-hand accounts of life in a place. To locate county histories in the Local Catalog, search the words "county history Oklahoma" (without the quotes). Another good way to locate a county or town history is to do a subject search for that place in the subject category. (For example, click here for materials on Norman, Oklahoma.)