California mineral production for 1920, with county maps
By: by Walter W. Bradley.
Contributors: California State Mining Bureau.
Series: Bulletin / California State Mining Bureau -- no. 90; Bulletin (California State Mining Bureau) -- no. 90.
Publisher: California State Print. Office
Published: 1921
Place of publication: Sacramento
Language: eng
Number of pages: 218
Subjects: Mines and mineral resources -- California.