Lively, R. S.Morey, G.B.Distribution and concentrations of Molybdenum, and Sodium, and Nickel, and Phosphorous, and Scandium, and Silicon in bedrock water wells, scale 1:600,000.PDFengMinnesota Geological SurveyPublicGround-water geochemical atlas for parts of east-central Minnesota, M-58, Plate 4MapsMinnesota1985University of Minnesota