Fluorspar District of Illinois Historical Document Folder: Illinois Fluorspar Investigations File: Blue Diggings Mine and Vicinity.pdf UID: 297
Dates
Dataset Reference Date
2015-09-28
Summary
Historical Fluorspar District Document from Industrial Mineral Section Records Folder: Illinois Fluorspar Investigations File: Blue Diggings Mine and Vicinity.pdf Type: Report UID: 297
Summary
Historical Fluorspar District Document from Industrial Mineral Section Records Folder: Illinois Fluorspar Investigations File: Blue Diggings Mine and Vicinity.pdf Type: Report UID: 297