map and statistical data prepared in cooperation with V.C. Heikes, Statistician in Charge, U.S. Bureau of Mines, Department of Commerce, Custom House, San Francisco.
Includes text, indexes, "Map of California, showing major rock units and their significance to exploration for manganese deposits," 2 diagrams and 4 graphs.
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.