Creator
- United States. Department of Housing and Urban Development19
- Geological Survey (U.S.)14
- Environmental Systems Research Institute (Redlands, Calif.)13
- Kelso, Nathaniel Vaughn12
- Patterson, Tom12
- National Atlas of the United States6
- United States. Bureau of Transportation Statistics4
- Gap Analysis Program (U.S.)3
- National Energy Information Center (U.S.)3
- United States. Bureau of the Census. Geography Division2
- Institute for Water Resources (U.S.). Navigation Data Center1
- John A. Volpe National Transportation Systems Center (U.S.)1
- Miller, David1
- Rukstales, Kenneth S. (compiler)1
- U.S. Census Bureau. Geography Division1
- United States Geological Survey1