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  1. By: Illinois. Dept. of Energy and Natural Resources. - Nature of Illinois Foundation.
    Publication info: [Springfield, Ill.?], Ill. Dept. of Energy and Natural Resources, the Nature of Ill. Foundation, 1994
    Holding Institution: University Library, University of Illinois Urbana Champaign
  2. By: Illinois. Dept. of Energy and Natural Resources. - Critical Trends Assessment Project.
    Publication info: Springfield, Ill, Ill. Dept. of Energy and Natural Resources, 1994
    Holding Institution: University Library, University of Illinois Urbana Champaign
  3. By: Gatz, Donald F. - Wiley, Susan T. - Chu, Lih-Ching. - Illinois. Dept. of Energy and Natural Resources.
    Publication info: [Springfield, Ill.], Illinois Dept. of Energy and Natural Resources, [1983]
    Holding Institution: University Library, University of Illinois Urbana Champaign
  4. By: Muggli, Robert Z. - Illinois. Dept. of Energy and Natural Resources.
    Publication info: [Springfield, Ill.], Illinois Dept. of Energy and Natural Reources, [1983]
    Holding Institution: University Library, University of Illinois Urbana Champaign
  5. By: Hey, Donald L. - Illinois. Dept. of Energy and Natural Resources.
    Publication info: [Springfield, Ill.], Illinois Dept. of Energy and Natural Resources, [1982]
    Holding Institution: University Library, University of Illinois Urbana Champaign
  6. By: Illinois. Dept. of Energy and Natural Resources. - Illinois. Natural History Survey Division - Critical Trends Assessment Project.
    Publication info: [Illinois], Illinois Dept. of Energy and Natural Resources, Office of Realty and Environmental Palnning, 2002
    Holding Institution: University Library, University of Illinois Urbana Champaign
  7. By: Illinois. Dept. of Energy and Natural Resources. - Illinois. Natural History Survey Division - Critical Trends Assessment Project.
    Publication info: [Illinois], Illinois Dept. of Natural Resources, Office of Realty and Environmental Palnning, Dec. 2004
    Holding Institution: University Library, University of Illinois Urbana Champaign
  8. By: Illinois. Dept. of Energy and Natural Resources.
    Publication info: [Springfield, Ill.?], Ill. Dept. of Energy and Natural Resources, [1990?]
    Holding Institution: University Library, University of Illinois Urbana Champaign
  9. By: Cook, Billy K. - Raman, Raman K. - Illinois State Water Survey. - Illinois. Dept. of Energy and Natural Resources.
    Publication info: Springfield, Ill, Illinois Dept. of Energy and Natural Resources, Energy and Environmental Affairs Division, [1986]
    Holding Institution: University Library, University of Illinois Urbana Champaign
  10. By: Heidinger, Roy C. - Lewis, William M. (William Madison), - Illinois. Dept. of Energy and Natural Resources.
    Publication info: Springfield, Ill, Illinois Dept. of Energy and Natural Resources, [1983]
    Holding Institution: University Library, University of Illinois Urbana Champaign