@misc{indiciae18016654c470,
  title = {Surficial geologic map of the Northfield quadrangle, Massachusetts, New Hampshire, and Vermont},
  author = {Kerry J. Campbell and Joseph H. Hartshorn},
  year = {1980},
  doi = {10.3133/gq1440},
  url = {https://pubs.usgs.gov/publication/gq1440},
  note = {Source identifier: gq1440}
}