1 : 1000000
"Population research and analysis and preparation of map ... by George A. Gendron, assisted by Edmond O. Burger; cartography by Walter R. Pilcher.|~|Includes 2 insets, county outline map, index with population figures, and notes.|~|U.S. Department of Agriculture, Bureau of Agricultural Economics, Division of Land Economics, with the valuable assistance of the U.S. Forest Service.
United States. Bureau of Agricultural Economics. Division of Land Economics.
Outline geologic map of California showing oil and gas fields and drilled areas
1 : 1000000
Includes "Map of California showing major rock units and their significance for oil and gas," "Enlarged map of the Los Angeles basin area," index to oil and gas fields, 1 chart and 2 graphs.|~|prepared under the direction of Olaf P. Jenkins, Geologic Branch.
California. Division of Mines and Geology.
State of California, Dept. of Natural Resources, Division of Mines
Reconnaissance erosion survey of the State of California
1 : 1500000
"California erosion survey of 1934 by E.J. Carpenter in charge ... Acknowledgement is made to College of Agriculture, University of California, for assistance.|~|U.S. Dept. of Agriculture, Soil Conservation Service ; field survey under direction of G.L. Fuller ; map compiled by W.F. Beamon, chief draftsman.|~|"Base map by U.S. Geological Survey, 1929."
United States. Soil Conservation Service.