Creator
- United States. Bureau of Transportation Statistics9
- National Atlas of the United States7
- United States. Bureau of the Census. Geography Division5
- U.S. Census Bureau. Geography Division2
- Environmental Systems Research Institute (Redlands, Calif.)1
- Geological Survey (U.S.)1
- Global Resource Information Database1
- Rawson, Peg1
- United Nations. Office for Disaster Risk Reduction1