@misc{indiciae060919c36331,
  title = {Mica-bearing pegmatites of New Hampshire: A preliminary report},
  author = {J. C. Olson},
  year = {1942},
  doi = {10.3133/b931p},
  url = {https://pubs.usgs.gov/publication/b931P},
  note = {Source identifier: b931P}
}