@misc{indiciaed9491445d968,
  title = {Bedrock geology of the Nashua River area, Massachusetts - New Hampshire},
  author = {Robinson},
  year = {1981},
  doi = {10.3133/ofr81593},
  url = {https://pubs.usgs.gov/publication/ofr81593},
  note = {Source identifier: ofr81593}
}