@misc{indiciae496ceefc5c8c,
  title = {Preliminary geologic report on the Milan Mine, Milan, Coos County, New Hampshire},
  author = {John H. Eric},
  year = {1943},
  doi = {10.3133/ofr79353},
  url = {https://pubs.usgs.gov/publication/ofr79353},
  note = {Source identifier: ofr79353}
}