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USA | |
| Singer, D.A., Berger, V.I., Moring, B.C. (2008) Porphyry copper deposits of the world: Database and grade and tonnage models, 2008. Open-File Report 2008-1155 (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Moen, W.S., (1977), St Helens and Washougal Mining Districts of the Southern Cascades of Washington: Washington Division of Geology and Earth Resources Inf. Circ. 60, P. 17, 34, 40. |
- Washougal Mining District
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. Moen, W.S. (1977) St. Helens and Washougal Mining Districts of the Southern Cascades of Washington. State of Washington Department of Natural Resources, Division of Geology and Earth Resources, Information Circular 60, p. 43, 58-59. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |