geology by Robert C. Witter ... [and others] ; digital database by Carl M. Wentworth, Suzanna K. Brooks, and Kathleen D. Gans ; in cooperation with the California Geological Survey
Date
2006
Edition
Version 1.1, May 2, 2006.
Series
U.S. Geological Survey open-file report ; 2006-1037
by Daniel J. Ponti ... [and others] ; in cooperation with the Los Angeles County Department of Public Works and Water Replenishment District of Southern California
Date
2007
Edition
Version 1.0, revised and reprinted 2007.
Series
U.S. Geological Survey open-file report ; 2007-1013