Union Catalogue of Belgian Libraries
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Map
Geologic map and section of the Redmond silver mine, Redmond, Utah, showing the oxidized zinc ore veins
Author:
Heyl, Allen V.
Year: 1963
Publisher: Washington (D.C.) U.S. Geological Survey
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Map
Map of the Madonna mine, Monarch, Colorado, showing the general geology of level 6, mine workings below level 6, and main ore bodies
Author:
Heyl, Allen V.
Year: 1964
Publisher: Washington (D.C.) U.S. Geological Survey
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Map
Map showing oxidized zinc deposits of Colorado
Author:
Heyl, Allen V.
Year: 1964
Publisher: Washington (D.C.) U.S. Geological Survey
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Map
Map showing oxidized zinc deposits of the Tintic district, Juab and Utah Counties, Utah
Author:
Heyl, Allen V.
Year: 1963
Publisher: Washington (D.C.) U.S. Geological Survey
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Book
Oxidized zinc deposits of the United States : part 3, Colorado
Author:
Heyl, Allen V.
Year: 1964
Publisher: Washington U. S. Geological Survey
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Map
Map and section of accessible parts of the Choate chromite mine, Soldiers Delight District, Baltimore County, Maryland
Author:
Heyl, Allen V.
Year: 1960
Publisher: Washington (D.C.) U.S. Geological Survey
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Map
Sketch map of the accessible workings of the Doctor mine, Spring Creek district, Gunnison County, Colorado
Author:
Heyl, Allen V.
Year: 1964
Publisher: Washington (D.C.) U.S. Geological Survey
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Map
Map showing the oxidized zinc deposits of Utah
Author:
Heyl, Allen V.
Year: 1963
Publisher: Washington (D.C.) U.S. Geological Survey
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Book
Oxidized zinc deposits of the United States : part 2, Utah
Author:
Heyl, Allen V.
Year: 1964
Publisher: Washington U. S. Geological Survey
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Book
Zoning of the Bitter Creek vanadium-uranium deposit near Uravan, Colorado
Author:
Heyl, Allen V.
Year: 1957
Publisher: Washington U. S. Geological Survey
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