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 Lillis Ranch, CA 1956. Photorevised 1971. Photoinspected 1978. DMA 1956 IV NW - series V895." "First printing, May 2007." "Michael D. Wracher honorary map." Includes location map, index to adjacent 7.5 minute quadrangles, and index to sources of geology, most recent 1969. Includes "pertinent references", most recent 1971.