pl23_theb2534.jpg
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https://www.noaa.gov/media/digital-library-photo/pl23theb2534jpg-0Description
Looking up the side of a 50-foot tower.Triangulation party of Wilbur Porter
Credit
NOAA, George E. Marsh Album
Display Date
1934
Location
Midwestern United States
Category
Historic Coast & Geodetic Survey
Geodesy
Triangulation
Bilby Steel Towers
Keywords
Geodesy
Triangulation
Towers
Bilby Steel