@misc{indiciae60bf5cf9a91a,
  title = {Deposits of manganese ore in Arizona},
  author = {E. L. Jones and Frederick Leslie Ransome},
  year = {1920},
  doi = {10.3133/b710d},
  url = {https://pubs.usgs.gov/publication/b710D},
  note = {Source identifier: b710D}
}