@misc{indiciaea08efa6d1e17,
  title = {Reconnaissance geologic map of part of the Milan quadrangle, New Hampshire-Maine, and the Percy quadrangle, New Hampshire},
  author = {Daniel J. Milton},
  year = {1968},
  doi = {10.3133/ofr68183},
  url = {https://pubs.usgs.gov/publication/ofr68183},
  note = {Source identifier: ofr68183}
}