Geologic map of the Point Mugu and Triunfo Pass quadrangles [cartographic material] : Ventura and Los Angeles Counties, California / by Thomas W. Dibblee, Jr. and Helmut E. Ehrenspeck.
Relief shown by contours and spot heights. "Contour interval 20 feet" Includes quadrangle location map and col. cross section. Published in cooperation the California Department of Conservation, Division of Mines and Geology; and U.S. Geological Survey.
- Dibblee Geological Foundation
- Held by
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