File:USGS 1950s mapping field camp.jpg
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![File:USGS 1950s mapping field camp.jpg](http://upload.wikimedia.org/wikipedia/commons/thumb/f/f3/USGS_1950s_mapping_field_camp.jpg/800px-USGS_1950s_mapping_field_camp.jpg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 20:50, 30 January 2009 | ![]() | 2,672 × 1,661 (3.5 MB) | Awickert | {{Information |Description={{en|1=A typical USGS mapping field camp. Note the helicopter parked near the trailers. Helicopters were first used by the USGS for topographic mapping in Death Valley in 1948. (Description from USGS.)}} |Source=USGS Historical |
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