Chico (also Valley Maidu) is an extinct Maiduan language formerly spoken by Maidu peoples who lived in Northern California, between Sacramento and the Sierra foothills. It may be a divergent dialect of Konkow or an independent language.[2]
Campbell, Lyle. (1997). American Indian languages: The historical linguistics of Native America. New York: Oxford University Press. ISBN978-0-19-509427-5.
Heizer, Robert F. (1966). Languages, territories, and names of California Indian tribes.