Geological Survey (U.S.) & ProQuest (Firm). (1913). Department of the Interior. United States Geological Survey. George Otis Smith, Director. Mineral resources of the United States calendar year 1912. [publisher not identified].
Chicago Style (17th ed.) CitationGeological Survey (U.S.) and ProQuest (Firm). Department of the Interior. United States Geological Survey. George Otis Smith, Director. Mineral Resources of the United States Calendar Year 1912. Washington: [publisher not identified], 1913.
MLA (9th ed.) CitationGeological Survey (U.S.) and ProQuest (Firm). Department of the Interior. United States Geological Survey. George Otis Smith, Director. Mineral Resources of the United States Calendar Year 1912. [publisher not identified], 1913.
Warning: These citations may not always be 100% accurate.