1. Paleoelevation estimated from Tertiary floras;Axelrod;International Geology Review,1997
2. The Cenozoic evolution of the San Joaquin Valley, California;Bartow;US Geological Survey Professional Paper,1991
3. The Kern River Formation, southeastern San Joaquin Valley, California;Bartow;US Geological Survey Bulletin,1983
4. Tertiary stratigraphy of the southeastern San Joaquin Valley, California, U;Bartow;S. Geological Survey Bulletin,1984
5. Bowersox, J.R., 2003. Pliocene age of the Etchegoin Group, San Joaquin Basin, California. American Association of Petroleum Geologists Search and Discovery Article #90014.