Creator
- United States. Bureau of Transportation Statistics2
- United States. Bureau of the Census. Geography Division2
- Firestine, Theresa1
- Hudgins, Andrew1
- Institute for Water Resources (U.S.). Navigation Data Center1
- United States. Bureau of Transportation Statisticsf1
- United States. Federal Transit Administration1
- Waterborne Commerce Statistics Center (U.S.)1
- von Dohlen, Jerry1