by Thomas W. Dibblee, Jr. ; edited by John A. Minch. Relief shown by contours and spot heights. "Topographic base map from available USGS 7.5-minute quadrangle Pancho Rico Valley CA 1967. AMS 1856 III SE - series V895." "First printing, February 2007." Includes quadrangle location map, index to adjacent 7.5 minute quadrangles, and index to sources of geology, most recent field work 2003. Includes "pertinent references", most recent 1979.