Edlund, M., Ramstack Hobbs, J., and Engstrom, D. (2013) Biomonitoring using diatoms and paleolimnology in the western Great Lakes national parks: 2011/2012 summary. Natural Resource Technical Report NPS/GLKN/NRTR—2013/814. National Park Service, Fort Collins, Colorado. http://science.nature.nps.gov/im/units/glkn/publications.cfm