@misc{indiciae9b600dd89745,
  title = {Surficial geologic map of the Townsend quadrangle, Middlesex and Worcester Counties, Massachusetts, and Hillsborough County, New Hampshire},
  author = {Carl Koteff and Byron D. Stone},
  year = {1990},
  doi = {10.3133/gq1677},
  url = {https://pubs.usgs.gov/publication/gq1677},
  note = {Source identifier: gq1677}
}