Creator
- United States. Department of Housing and Urban Development16
- Kelso, Nathaniel Vaughn10
- Patterson, Tom10
- Environmental Systems Research Institute (Redlands, Calif.)3
- Geological Survey (U.S.)2
- United States. Bureau of Transportation Statistics2
- United States. Bureau of the Census. Geography Division2
- County of San Mateo Information Services Department1
- U.S. Census Bureau. Geography Division1