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Books by Leonard F Heising

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2 books found
Lake Superior iron resources: Reexamination of nonmagnetic taconite occurrences in the Hibbing, Minn., area by flotation, magnetic separation, and petrographic methods (Report of investigations)
Lake Superior iron resources: Reexamination of nonmagnetic …
By: Leonard F Heising
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Open-pit iron mining, milling, and costs, Groveland Mine, the Hanna Mining Co., Dickinson County, Mich.
Open-pit iron mining, milling, and costs, Groveland Mine, t…
By: Leonard F. Heising
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