@misc{indiciae1f9ebf974167,
  title = {Manganese in the United States, exclusive of Alaska and Hawaii},
  author = {Max D. Crittenden and Louis Pavlides},
  year = {1962},
  doi = {10.3133/mr23},
  url = {https://pubs.usgs.gov/publication/mr23},
  note = {Source identifier: mr23}
}