Fluorspar District of Illinois Historical Document Folder: Crystal Mine File: Underground Workings Map.tif UID: 72
Dates
Dataset Reference Date
2015-09-28
Summary
Historical Fluorspar District Document from Industrial Mineral Section Records Folder: Crystal Mine File: Underground Workings Map.tif Type: Map UID: 72
Summary
Historical Fluorspar District Document from Industrial Mineral Section Records Folder: Crystal Mine File: Underground Workings Map.tif Type: Map UID: 72