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Coal mine illumination :proceedings, Bureau of Mines Technology Transfer Seminars.
Mine illumination :proceedings
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Published Year
1970-1979 (1)
1980-1989 (1)
Subject
Mine lighting--Congresses (2) *
Coal mines and mining--United States--Congresses (1)
Author
Lewis, W. H. (1)
Whitehead, K. L. (1)
