Creator
- California. Department of Fish and Game13
- United States. Bureau of Transportation Statistics2
- Applied Science Associates1
- Canada Centre for Remote Sensing1
- Environmental Systems Research Institute (Redlands, Calif.)1
- Geological Survey (U.S.)1
- Instituto Nacional de Estadística, Geografía e Informática (Mexico)1
- National Atlas of the United States1
- United States. Federal Transit Administration1