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Analysis of 494 accidents, open-pit iron-ore mines, beneficiation plants, and shops Lake Superior District
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Published Year
1950-1959 (1) *
Subject
Iron mines and mining--Superior, Lake (1)
Mine accidents--United States (1) *
Author
Look, A. D. (1)
Pynnonen, R. O. (1)
Zaverl, L. J. (1)
