@misc{indiciae769a959f8daf,
  title = {Guidelines for finding concretionary Mn-Fe oxides in streams},
  author = {G.A. Nowlan},
  year = {1982},
  doi = {10.1016/0375-6742(82)90021-8},
  url = {https://pubs.usgs.gov/publication/70011909},
  note = {Source identifier: 70011909}
}