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 Panoche Pass, CA 1968. AMS 1757 II NE - series V895." "First printing, June 2007." Includes location map, index to adjacent 7.5 minute quadrangles, and index to sources of geology, most recent 1973. Includes "pertinent references", most recent 1999.