Electrum from
USA | |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Ronald Wynn Sheets, James R. Craig, Robert J. Bodnar (1995) Composition And Occurrence Of Electrum At The Morning Star Deposit, San Bernardino County, California: Evidence For Remobilization Of Gold And Silver. Canadian Mineralogist 33:137-151 |