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  1. Critical trends in Illinois ecosystems /
    By: Critical Trends Assessment Program. - Illinois.
    Publication info: Springfield, Ill. :Illinois Natural History Survey,2001.
    Contributed by: University of Illinois Urbana Champaign
    Subjects: Conservation of natural resources  Ecological assessment (Biology)  Effects of human beings on  Environmental impact analysis  Environmental quality  Illinois  Nature  Pollution  
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  2. Lund easement baseline biological inventory /
    By: Jean, Catherine. - Hendricks, P. - Montana Natural Heritage Program.
    Publication info: Helena, Mont. :Montana Natural Heritage Program,c2001
    Contributed by: Montana State Library (archive.org)
    Subjects: Ecological assessment (Biology)  Grasslands  Hill County  Montana  Prairie Pothole Region  Wetlands  
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