A collection of over 3,000 digitized photographs
of natural vegetation in California, taken during the 1920s and 1930s as part of a U.S. National Forest Service survey. Many of the photographs feature links to corresponding historical topographical maps from the United States Geological Survey (USGS). Searchable, and browsable by place name (quad), species, and interactive map. From the Marian Koshland Bioscience and Natural Resources Library, University of California, Berkeley.