Minnesota Department of Natural Resources (DNR), Ecological and Water Resources Division, County Geologic Atlas Program. (2016). Pollution Sensitivity of the Bedrock Surface, Minnesota Hydrogeology Atlas series HG-01: Minnesota. State of Minnesota. https://gisdata.mn.gov/dataset/geos-hydrogeology-atlas-hg01

Available from: https://geo.btaa.org/catalog/e4dddc40-f157-4291-aa7a-c4432c0054d1