Michigan. Geological Survey & Allen, R. G. (1915). Mineral resources of Michigan with statistical tables of production and value of mineral products for 1914 and prior years: With a treatise on Michigan copper deposits by R.E. Hore. Wynkoop Hallenbeck Crawford.
Chicago Style (17th ed.) CitationMichigan. Geological Survey and R. G. Allen. Mineral Resources of Michigan with Statistical Tables of Production and Value of Mineral Products for 1914 and Prior Years: With a Treatise on Michigan Copper Deposits by R.E. Hore. Lansing, Mich.: Wynkoop Hallenbeck Crawford, 1915.
MLA (9th ed.) CitationMichigan. Geological Survey and R. G. Allen. Mineral Resources of Michigan with Statistical Tables of Production and Value of Mineral Products for 1914 and Prior Years: With a Treatise on Michigan Copper Deposits by R.E. Hore. Wynkoop Hallenbeck Crawford, 1915.