Minnesota Department of Natural Resources (DNR). (Dec 19, 2014). Ecological Land Type Associations of: Minnesota. State of Minnesota. https://gisdata.mn.gov/dataset/d2753e26-526b-46d6-9659-f79ac728b676

Available from: https://geo.btaa.org/catalog/d2753e26-526b-46d6-9659-f79ac728b676