State of California. Department of Natural Resources. Division of Mines. Map has other sections: Sheet no. I. Northern section -- Sheet no. II. Central section -- Sheet no. III. Southwest coast section -- Sheet no. V. East-central section -- Sheet no. VI. Southern section. Ancillary maps: Map of California showing average annual precipitation; Index map showing topographic quadrangles of California published by the U.S. Geological Survey; Indecx map to principal sources of geologic data to Jan. 1938.