@misc{indiciae3373507f55b8,
  title = {Geologic map of the Heath quadrangle, Massachusetts and Vermont},
  author = {Norman L. Hatch and Joseph H. Hartshorn},
  year = {1968},
  doi = {10.3133/gq735},
  url = {https://pubs.usgs.gov/publication/gq735},
  note = {Source identifier: gq735}
}