Small-scale placer-mining methods
By: by Chas. F. Jackson and John B. Knaebel
Contributors: Knaebel, John B. (John Ballantine), 1906-1991, author
Series: United States. Mines Bureau. Information circular -- [no.] 6611; Information circular (United States. Bureau of Mines) -- 6611
Published: 1932
Place of publication: Washington]
Language: eng
Number of pages: 17
Subjects: Gold; Mines and mining; Hydraulic mining; Bibliography
Notes: "Selected bibliography," p. 15-17.