Dokumentuaren aipamena

APA (7th ed.) Zitazioa
Estados Unidos Geological Survey. (19). Geologic map of copper range from Mount Houghton to Delaware, Michigan. U. S. Geological Survey.
Chicago Style (17th ed.) Zitazioa
Estados Unidos Geological Survey. Geologic Map of Copper Range from Mount Houghton to Delaware, Michigan. U. S. Geological Survey, 19.
MLA (9th ed.) Zitazioa
Estados Unidos Geological Survey. Geologic Map of Copper Range from Mount Houghton to Delaware, Michigan. U. S. Geological Survey, 19.
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