California Atlas of Historical County Boundaries
John H. Long, Editor; Peggy Tuck Sinko, Historical Compiler; Laura Rico-Beck , GIS Specialist and Digital Compiler; Peter Siczewicz, ArcIMS Interactive Map Designer; Emily Kelley, Research Associate; Robert Will, Cartographic Assistant
Copyright The Newberry Library 2003
BRANCIFORTE (see SANTA CRUZ)
BUENA VISTA (proposed)
COLUSA (created as COLUSI)
COLUSI (see COLUSA)
COSO (proposed)
FRESNO (created as FREZNO)
FREZNO (see FRESNO)
KLAMATH (extinct)
Mare Island (non-county area)
Non-county area (see Mare Island)
PAUTAH (proposed)
SANTA CRUZ (created as BRANCIFORTE)