@misc{indiciae471cb84d6594,
  title = {Surficial geologic map of the Greenfield quadrangle, Franklin County, Massachusetts},
  author = {Richard Henry Jahns},
  year = {1966},
  doi = {10.3133/gq474},
  url = {https://pubs.usgs.gov/publication/gq474},
  note = {Source identifier: gq474}
}