Coal mine illumination :proceedings, Bureau of Mines Technology Transfer Seminars.

Year: 1976
Document Type: USBI
Issuing Agency: U.S. Dept. of the Interior, Bureau of Mines,
SUDOC: I 28.27:8709
Series: Information circular - Bureau of Mines ;
Report Number: 8709
Subjects: Coal mines and mining--United States--Congresses
Mine lighting--Congresses
Link: https://hdl.handle.net/2027/mdp.39015078462465

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