Search Results - Heising, Leonard F.

Lake Superior iron resources : reexamination of nonmagnetic taconite occurrences in the Hibbing, Minn., area by flotation, magnetic separation, and petrographic methods / by Heising, Leonard F.

Lake Superior iron resources : preliminary sampling and metallurgical evaluation of central Mesabi nonmagnetic taconites / by Heising, Leonard F.

Review of the ammonia industry and its application to North Dakota / by Heising, Leonard F.

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Open-pit iron mining, milling, and costs, Groveland Mine, the Hanna Mining Co., Dickinson County, Mich. / by Heising, Leonard F.

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Lake Superior iron resources : preliminary samples and metallurgical evaluation of selected Michigan-Wisconsin iron formations / by Heising, Leonard F., Frommer, D. W. (Donald W.)

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Core-drill sampling of Cuyuna-range manganiferous iron formations, Crow Wing County, Minnesota /

Other Authors: “…Heising, Leonard F.…”
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Lake Superior iron resources : metallurgical evaluation and classification of nonmagnetic taconite drill cores from the west central Mesabi Range / by Wasson, Paul A.

Other Authors: “…Heising, Leonard F.…”