The Bureau of Mines coal-sampling truck

Author: Kudlich, Rudolf H.,
Year: 1931
Document Type: USBI
Issuing Agency: U.S. Dept. of the Interior, Bureau of Mines,
Series: Information Circular / Bureau of Mines ;
Report Number: 6545
Subject: Coal mines and mining--Equipment and supplies
Link: https://hdl.handle.net/2027/mdp.39015077561762

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