by Thomas W. Dibblee, Jr. ; edited by John A. Minch. Relief shown by contours and spot heights. "Topographic base map from newest available USGS 7.5-minute quadrangle SAN DIMAS, CA 1981, ONTARIO, CA 1981, NIMA 2452 IV SE - Series V895." "Prepared in cooperation with the Santa Barbara Museum of Natural History." "Jack G. Vedder Honorary Map." "First printing, July 2002." Includes quadrangle location map, index to adjacent 7.5 minute quadrangles, and index to sources of geology. Includes bibliographical references.