@misc{indiciae566c44db2f88,
  title = {Reconnaissance bedrock geologic map of the Ashfield quadrangle, Franklin County, Massachusetts},
  author = {N. L. Hatch},
  year = {1981},
  doi = {10.3133/mf855},
  url = {https://pubs.usgs.gov/publication/mf855},
  note = {Source identifier: mf855}
}