Bulletin No. 25 - An Inventory of Minnesota Lakes Image Date Issued 1968 Main Topic Surface Water Water Quality & Pollutants Water Use & Availability Water Conveyance & Hydraulics Water Policy
Water Resources Data for Minnesota, 1967 Image Date Issued 1968 Author US Geological Survey Main Topic Surface Water Water Quality & Pollutants Water Use & Availability Water Education, Outreach & Community Capacity