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USA | |
| Moen, W. S. (1977). St. Helens and Washougal mining districts of the southern Cascades of Washington (Vol. 60). State of Washington, Department of Natural Resources, Division of Geology and Earth Resources. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. Cannon, Bart (1975) Minerals of Washington. Cordilleran, Mercer Island, WA. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. Cannon, Bart (1975) Minerals of Washington. Cordilleran, Mercer Island, WA. |
- Washougal Mining District
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
Camp Creek Placer, McCoy Peak, Skamania County, Washington, USA