Pattern and process : research in historical geography : [papers and proceedings of the Conference on the National Archives and Research in Historical Geography /
Conference on the National Archives and Research in Historical Geography,Washington, D.C.,1971.
Ehrenberg, Ralph E.,1937-ed.
United States.National Archives and Records Service.
Washington : Howard University Press,
1975.
Includes index.
Bibliography: p. 315-350.
National Archives (U.S.)