Collection, 1911-1978, compiled by Louis Koepel, a resident and historian of Michigan's Copper Country. Includes Securities and Exchange Commission filings for the merger of the Copper Range Company with Louisiana Land and Exploration Company, SEC paperwork for the Calumet and Hecla, Inc. sale to Universal Oil Products, auction catalogs for disposition of the W. Parsons Todd Collection, parts catalogs, patents. Also includes blueprints for the J. P. Cooper house in East Hancock, Michigan.

Catalogs, 1991-1993, for real estate auctions offered by The Ventures Group, Inc., a for profit organization associated with Michigan Technological University in Houghton, Michigan. Includes auction catalogs, property information packages and financial reports prepared for the Board of Control of Michigan Technological University.