Minnesota Department of Natural Resources. 2012. Statement of Need and Reasonableness: In the Matter of Proposed Amendment to and Repeal of Rules Governing Minnesota’s List of Endangered, Threatened, and Special Concern Species in Minnesota Rules, Chapter 6134: Endangered and Threatened Species. State of Minnesota, Department of Natural Resources, Division of Ecological and Water Resources. http://files.dnr.state.mn.us/input/rules/ets/SONAR_all_species.pdf