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Hecht did the honors at station west of Mandan ....Triangulation party of Wilbur Porter
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Hecht did the honors at station west of Mandan ....Triangulation party of Wilbur Porter
11/26/2018 12:04:22 PM
Date:
4-Sep-34
Credit:
NOAA, George E. Marsh Album
Location:
North Dakota
Subject:
Geodesy
Subject:
Triangulation
Subject:
Angles
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