1. Peat deposits of Koochiching County Minnesota showing locations of drainage ditches. Maps University Of Minnesota Public content 1919. Cartographic Details: Scale [1:253,240] (W 94°25'00"--W 93°04'00"/N 48°42'00"--N 47°50'00"). "Compiled from maps of U.S. land office county map. Dr... Minnesota Geological Survey (Minnesota).