Fluorspar District of Illinois Historical Document Folder: Crystal Mine File: Illinois Fluorspar Investigations II - Crystal Fluorspar Company Property.pdf UID: 68
Dates
Dataset Reference Date
2015-09-28
Info Date
1947-01-01
Summary
Historical Fluorspar District Document from Industrial Mineral Section Records Folder: Crystal Mine File: Illinois Fluorspar Investigations II - Crystal Fluorspar Company Property.pdf Type: Report Author: Grogan, R. M. UID: 68
Summary
Historical Fluorspar District Document from Industrial Mineral Section Records Folder: Crystal Mine File: Illinois Fluorspar Investigations II - Crystal Fluorspar Company Property.pdf Type: Report Author: Grogan, R. M. UID: 68