TY  - BOOK
AU  - Ehrenberg, R. E.
AU  - Ehrenberg, Ralph E.,
ED  - United States.
TI  - Pattern and process: research in historical geography : [papers and proceedings of the Conference on the National Archives and Research in Historical Geography 
SN  - 0882580507
U1  - 911.73 EHR 
PY  - 1975///
CY  - Washington
PB  - Howard University Press
KW  - United States
KW  - National Archives and Records Service
KW  - Historical geography
KW  - Congresses
KW  - Sources
KW  - Bibliography
N1  - Includes bibliographical references: p. 315-350 and index
ER  -