Ingersoll, G. E. (1932). Hand methods of placer mining and placer mining districts of Washington and Oregon. State College of Washington.
Chicago Style (17th ed.) CitationIngersoll, Guy Ernest. Hand Methods of Placer Mining and Placer Mining Districts of Washington and Oregon. [Pullman: State College of Washington, 1932.
MLA (8th ed.) CitationIngersoll, Guy Ernest. Hand Methods of Placer Mining and Placer Mining Districts of Washington and Oregon. State College of Washington, 1932.
Warning: These citations may not always be 100% accurate.