2013. Waterborne Commerce Statistics Center (U.S.) and United States. Bureau of Transportation Statisticsf. This point shapefile depicts ports politically defined by port limits or USACE projects, excluding non-USACE projects not authorized for publicatio... United States. Bureau of Transportation Statistics.
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1916. Sherman, C. E. (Christopher Elias), 1869-1940. Scale approximately1:31 680. "March 20, 1916." "Map no. 1." Includes legend. report of C.E. Sherman.