El Cajon San Diego County California WesternUnited States United States Geological Survey U.S. Geological Survey USGS Topographic 15 minute 1:62,500 scale Polyconic
Time Period
1938/1939
Place
32.75000,-117.00000 33.00000,-117.00000 33.00000,-116.75000 32.75000,-116.75000 California El Cajon USA
Source
University of Southern California [Contributing entity]
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