Morey, G.B.Broberg, J.Beltrame, R.J.Holtzman, R.C.2012-04-042012-04-041977http://purl.umn.edu/122265Summary of the geology and distribution of manganese-bearing minerals, Cuyuna Iron Range, east-central Minnesotaen-USManganese-bearing ores of the Cuyuna Iron Range, east-central Minnesota, Phase 1Report