Trinity County, California.

1894

Johnson, Jno. F.

1:127k

Trinity County.

1935

California Division of Highways

1:205k

Hoaglin

1931

1:125k

Gold Mines Located and Described by Chas. V. Averill 1933

1933

California. Division of Mines and Geology

1:1m

Geologic Map of California, Redding Sheet.

1962

California Division of Mines and Geology

1:250k

Northern California, Humboldt, Trinity Counties (sheet 3)

1844

California: Office of State Engineer

1:253k

Geological Map of Shasta County California

1893

State Mineralogist

1:50k

Humboldt County.

1935

California Division of Highways

1:225k

Shasta County.

1935

California Division of Highways

1:193k

Pickett Peak Quadrangle, California

1974

Alpha, Tau Rho