Gypsum from selected localities.
USA | |
| MRDS database Dep. ID file #10060181, MRDS ID #TC10138. |
| MRDS database Dep. ID file #10234484, MAS ID #0040190388. |
| Stone, R.W. (1920), Gypsum deposits of the United States, USGS Bull. 697: 52. |
MRDS database Dep. ID file #10186293, MAS ID #040190679. |