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Pappy Shelton, chief of the first geodimeter party, using Model 2A geodimeter Picture

Pappy Shelton, chief of the first geodimeter party, using Model 2A geodimeter

Pappy Shelton, chief of the first geodimeter party, using Model 2A geodimeter. This instrument used a mercury vapor light source.

Author: NOAA

License: Public Domain Mark 1.0 (Public domain)
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Added On
16th October 2015
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