@misc{indiciaef378f86040c9,
  title = {Geologic map of the Granville area, Hampden County, Massachusetts},
  author = {Douglas A. Knapp},
  year = {1978},
  doi = {10.3133/ofr78271},
  url = {https://pubs.usgs.gov/publication/ofr78271},
  note = {Source identifier: ofr78271}
}