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Determining the Elevations
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Coast-Geodetic-Survey
Geodesy
Determining the Elevations
Driving pin for steady rod support.Level party of Al Thorson
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Driving pin for steady rod support.Level party of Al Thorson
3/18/2019 12:28:29 PM
Date:
1933
Credit:
C&GS; Season's Report Thorson 1933
Subject:
Geodesy
Subject:
Leveling
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