Mica Group from
USA | |
| Holmes, G.H., Jr. , Investigations of beryllium deposits in the northern Virgin Mountains of Clark County, Nevada, and Mohave County, Arizona, US Bur. Mines Info Circ. 6572: 13-20 MRDS file #10027713. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |