Browse Staff Research, Reports, Maps, Publications, and Presentations - Illinois State Geological Survey by Subject "Illinois"

  • Christensen, H.P.; Erb, E. (Champaign, IL: Illinois State Geological Survey, Prairie Research Institute, 1927)
    "Directory of Illinois Mineral Operators" to accompany the map.

    application/pdf

    application/pdfPDF (4MB)
  • Eich, Alma R. (Champaign, IL: Illinois State Geological Survey, Prairie Research Institute, 1930)
    "Directory of Illinois Mineral Operators" to accompany the map.

    application/pdf

    application/pdfPDF (3MB)