@misc{indiciae4f725413c17f,
  title = {Bedrock geologic map of Hubbard Brook Experimental Forest and maps of fractures and geology in roadcuts along Interstate 93, Grafton County, New Hampshire},
  author = {Christopher Cramer Barton},
  year = {1997},
  doi = {10.3133/i2562},
  url = {https://pubs.usgs.gov/publication/i2562},
  note = {Source identifier: i2562}
}