@misc{indiciae1e379f699b10,
  title = {Valencia and Hackett mica mines, Groton, New Hampshire},
  author = {C.S. Maurice and J.B. Headley},
  year = {1943},
  doi = {10.3133/ofr4367},
  url = {https://pubs.usgs.gov/publication/ofr4367},
  note = {Source identifier: ofr4367}
}