Fluorspar District of Illinois Historical Document Folder: Asphaltite (Grahamite) File: Description of Grahamite Sample.pdf UID: 1
Dates
Dataset Reference Date
2015-09-28
Info Date
1966-04-01
Summary
Historical Fluorspar District Document from Industrial Mineral Section Records Folder: Asphaltite (Grahamite) File: Description of Grahamite Sample.pdf Type: Report Author: Perry, B.L. UID: 1
Summary
Historical Fluorspar District Document from Industrial Mineral Section Records Folder: Asphaltite (Grahamite) File: Description of Grahamite Sample.pdf Type: Report Author: Perry, B.L. UID: 1