A review of mining in California during 1919 ... 1921
Subtitle: with notes on the outlook for 1920, 1922.
Series: Its -- nos. 6, 8; Preliminary report (California State Mining Bureau) -- no. 6, 8.
Publisher: California State Printing Office
Published: 1920
Place of publication: Sacramento
Language: eng
Subjects: Mines and mineral resources -- California