Metropolitan Council. (2015). Aggregate Resources: Twin Cities Metropolitan Area, Minnesota, 1997, 2020 and 2040. Metropolitan Council. https://gisdata.mn.gov/dataset/us-mn-state-metc-geos-aggregate-resources

Available from: https://geo.btaa.org/catalog/c2e6cccd-2105-4d62-80c7-e1d160381054