Pumice from Cochise County, Arizona, USA
USA | |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Howell, K.K. (1977) Geology and alteration of the Commonwealth mine, Cochise County, Arizona: Tucson, University of Arizona, M.S. thesis, 225 p. |