The Minnesota Department of Natural Resources (DNR) works with citizens to conserve and manage the state's natural resources, provides outdoor recreation opportunities, and supports commercial uses of natural resources in ways that create a sustainable quality of life. Each year, the Minnesota Department of Natural Resources (DNR) writes and distributes publications and reports to further the organization's mission. These publications and reports include investigative reports, fisheries education research publications and more | Curly-leaf Pondweed Trends And Interrelationships With Water Quality by Steven Heiskary, Paperback | Indigo Chapters