Fluorspar District of Illinois Historical Document Folder: Knox & Yingling Drilling File: Knox and Yingling Drilling.tif UID: 334
Dates
Dataset Reference Date
2015-09-28
Summary
Historical Fluorspar District Document from Industrial Mineral Section Records Folder: Knox & Yingling Drilling File: Knox and Yingling Drilling.tif Type: Map Author: Saxby, D. B. UID: 334
Summary
Historical Fluorspar District Document from Industrial Mineral Section Records Folder: Knox & Yingling Drilling File: Knox and Yingling Drilling.tif Type: Map Author: Saxby, D. B. UID: 334