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Progress reports :metallurgical division.
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Published Year
1930-1939 (1)
Subject
Flotation (1)
Fluorspar--Illinois (1) *
Lead--Illinois (1)
Zinc--Illinois (1)
Author
Clemmer, J. B. (1)
DeVaney, F. D. (1) *
Duncan, W. E. (1)
Guggenheim, M. (1)
