County Data and Statistics
- California Department of Finance (dof.ca.gov)
- Center for Economic Development (cedcal.com)
- California State Association of Counties (csac.counties.org)
- California State Association of Counties - Modoc County (csac.counties.org)
- California/USA Inflation/Consumer Price Index
- Watershed - Pit River Watershed Assessment - October 2004
- Watershed - Pit River Watershed Alliance (pitriveralliance.net)
- US Fish and Wildlife Service - Geographic Information (fws.gov)
- California Fish and Game IMAPS Viewer (wildlife.ca.gov)