Geologic map of the Green Valley quadrangle [cartographic material] : Los Angeles County, California / by Thomas W. Dibblee, Jr.; edited by Helmut E. Ehrenspeck.
Relief shown by contours and spot heights. "William R. Muehlberger honorary map." "Prepared in cooperation with the California Department of Conservation, Division of Mines and Geology; U.S. Forest Service, Angeles National Forest; and U.S. Geological Survey." "William R. Muehlberger Honorary Map." "First printing, May 1997". Includes acknowledgments, index to sources of geology, 2 col. cross-sections, and location map.
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