@misc{indiciaebea68c57741f,
  title = {Preliminary surficial geologic map of the Northfield Quadrangle, Massachusetts-New Hampshire-Vermont},
  author = {K.I. Campbell and J. H. Hartshorn},
  year = {1974},
  doi = {10.3133/ofr7455},
  url = {https://pubs.usgs.gov/publication/ofr7455},
  note = {Source identifier: ofr7455}
}