Polybasite from Oregon, USA
USA | |
| Koschmann, Albert Herbert, Bergendahl, M.H. (1968) Principal gold-producing districts of the United States. Professional Paper 610. US Geological Survey doi:10.3133/pp610 |
| Bargar, K.E., Oscarson, R.L. (1997) Zeolites and selected other hydrothermal minerals in the Cascade Mountains of northern Oregon. Open-File Report Vol. 1997 (97-100) US Geological Survey doi:10.3133/ofr97100 |