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 Cerro Colorado, CA 2000. NIMA 1857 III NW--Series V895." "First printing, June 2007." Includes location map, index to adjacent 7.5 minute quadrangles, and index to sources of geology, most recent 1971. Includes "pertinent references", most recent 1999.