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 Pacheco Peak, CA, 1955. Photorevised 1971. Photoinspected 1978. DMA 1758 III SE - Series V895." "First printing, July 2007." Includes location map, index to adjacent 7.5 minute quadrangles, and index to sources of geology, most recent 1974. Includes "pertinent references", most recent 1999.