The hard rock mining era in the copper country.
By: by Tauno Kilpela.
Publisher: T. Kilpela
Published: 1993
Place of publication: [Michigan?]
Language: eng
Number of pages: 11
Subjects: Copper mines and mining -- Michigan -- Houghton County -- History.
Other titles: Atlantic amygdaloid lode, 1864-1906.
Notes: Includes bibliographical references (p. 11).