Cobb, E. H. (1981). Placer gold occurrences in Alaska. Dept. of the Interior, U.S. Geological Survey.
Chicago Style (17th ed.) CitationCobb, Edward H. Placer Gold Occurrences in Alaska. [Reston, Va.]: Dept. of the Interior, U.S. Geological Survey, 1981.
MLA (8th ed.) CitationCobb, Edward H. Placer Gold Occurrences in Alaska. Dept. of the Interior, U.S. Geological Survey, 1981.
Warning: These citations may not always be 100% accurate.