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 Oceano, CA 1965, revised 1994, DMA 1854 II SE -- Series V895." "Contour interval 20 feet, supplementary contour interval 10 feet." "First printing, April 2006." Includes quadrangle location map, index to adjacent 7.5 minute quadrangles, and index to sources of geology. Includes "pertinent references."