@misc{indiciae84f166b7ad03,
  title = {Manganese deposits of eastern Aroostook County, Maine},
  author = {W. S. White and Preston E. Could},
  year = {1943},
  doi = {10.3133/ofr4347},
  url = {https://pubs.usgs.gov/publication/ofr4347},
  note = {Source identifier: ofr4347}
}