List of permissible mine equipment approved during 1937

Author: Ilsley, L. C.
Year: 1938
Document Type: USBI
Issuing Agency: U.S. Dept. of the Interior, Bureau of Mines,
SUDOC: I 28.27:7007
Series: Information circular / Bureau of Mines ;
Report Number: 7007
Subjects: Mining machinery
Mines and mineral resources--Equipment and supplies
Link: https://hdl.handle.net/2027/mdp.39015077575671

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