Potential Hydrologic Effects of Peat Mining in The Red Lake Peatlands, North-Central Minnesota a Project Plan Image Date Issued 1979-12 Author Siegel, Donald I. Main Topic Surface Water Water Quality & Pollutants Hydrology
Hydrology and Water-Quality of The Copper-Nickel Study Region Northeastern Minnesota Image Date Issued 1980 (year uncertain) Author Siegel, Donald I. Ericson, Donald W. Main Topic Hydrology Water Quality & Pollutants
