Aquatic studies in National Parks of the the Upper Great Lakes States: Past efforts and future directions
Lafrancois Moraska B and Glase J. 2005. Aquatic studies in National Parks of the the Upper Great Lakes States: Past efforts and future directions. NPS/NRWRD/NRTR-2005/334 (NPS D-59). National Park Service, Great Lakes Inventory and Monitoring Network. Ashland, WI