Serpentine Subgroup from selected localities.
USA | |
| Huntting, M. (1956): Inventory of Washington Minerals, Part II, Metallic Minerals, Vol. 1; Cannon, B. (1975): Minerals of Washington, p.45; Lasmanis, R. Et Al (1990): Metal Mines of Washington-Preliminary Report; Milton, C., & Milton, D. J. (1958). Nickel-gold ore of the Mackinaw mine, Snohomish County, Washington. Economic Geology, 53(4), 426-447. |
| Derkey, R., Joseph, N., Lasmanis, R. (1990) Metal Mines of Washington-Preliminary Report. Washington Division of Geology and Earth Resources Open File Report 90-18, Washington State Department of Natural Resources, 277 pages. |