U.S. Coast and Geodetic Survey. Depths shown by isolines and soundings. "Soundings in feet." Includes tidal information, and tables of channel depths. U.S. Coast and Geodetic Survey.
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U.S. Coast and Geodetic Survey. Depths shown by isolines and soundings. Relief shown by hachures. "Soundings in feet." Includes tables of channel depths, tidal information, and lo... U.S. Coast and Geodetic Survey.