Oblique aerial view of failure of road fill on Interstate Highway 80, east of San Francisco. View includes machinery at work. Photo by F.A. Taylor. City and County of San Francisco, California. ca. 1971. Published page 58, lower, in U.S. Geological Survey. Professional paper 1240-B. 1981. Professional Paper-1240

Digital File:gesu0015

ID. U.S. Geological Survey 15cp