Measured, indicated and inferred coal resources of Illinois
Read before Section of Illinois Coal Preparation Engineers and Chemists, Benton, Illinois.
Quality and extent of reserves and recommendations for certain areas of reserves; general chemistry of coal.
Manuscripts, maps, fieldnotes, and photographs may be viewed in-house only. Please contact the ISGS Special Collections Curator, Anne Huber, for an appointment at 217-300-0005 or email firstname.lastname@example.org Monday thru Friday, 8am-noon or 1pm-5pm.