Caledonia Mine, Keweenaw Peninsula Native Copper District, Ontonagon County, Michigan, Theodore J. Bornhorst, Robert J. Barron, Richard C. Whiteman
Theodore J. Bornhorst

59th Annual Meeting Institute on Lake Superior Geology, Houghton, Michigan: Proceedings, Part 2: Field Trip Guidebook, Theodore J. Bornhorst, Robert J. Barron
A. E. Seaman Mineral Museum Publications

Caledonia Mine, Keweenaw Peninsula Native Copper District, Ontonagon County, Michigan, Theodore J. Bornhorst, Robert J. Barron, Richard C. Whiteman
A. E. Seaman Mineral Museum Publications

Geologic Overview of the Keweenaw Peninsula, Michigan, Theodore J. Bornhorst, Robert J. Barron
A. E. Seaman Mineral Museum Publications

Copper deposits of the western Upper Peninsula of Michigan, Theodore J. Bornhorst, Robert J. Barron
A. E. Seaman Mineral Museum Publications