Plan
Vegetation types of California (exclusive of deserts and cultivated lands) [cartographic material] / by California Forest and Range Experiment Station of the U.S. Forest Service in cooperation with Division of Forestry of the University of California, Division of Forestry of the State Department of Natural Resources, Los Angeles County Forestry Department, and the U.S. Forest Service administrative organization of the California Region.1932 – 1940
California Forest and Range Experiment Station.