pl23_theb2525.jpg
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https://www.noaa.gov/media/digital-library-photo/pl23theb2525jpg-0Description
Tower at Station Schnackenburg.
Credit
C&GS; Season's Report Heaton 1929
Collection
Historic Coast & Geodetic Survey
Geodesy
Triangulation
Bilby Steel Towers
Keywords
Geodesy
Triangulation
Towers
Bilby Steel