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Coast and Geodetic Survey sounding tube equipment.Hydrographic Manual 1931, Figure 17, p. 53
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Coast and Geodetic Survey sounding tube equipment.Hydrographic Manual 1931, Figure 17, p. 53
3/20/2019 1:18:08 PM
Date:
1931
Credit:
NOAA Central Library
Subject:
Charting
Subject:
Soundings
Subject:
Tube
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