Creator
- Rawson, Peg1
- U.S. Census Bureau. Geography Division1
- United States Geological Survey1
- United States. Bureau of Customs and Border Protection1
- United States. Bureau of Transportation Statisticsf1
- United States. Department of Commerce1
- United States. Department of Housing and Urban Development1
- United States. Federal Aviation Administration1
- United States. Federal Highway Administration1
- United States. Federal Transit Administration1
- Waterborne Commerce Statistics Center (U.S.)1