@misc{indiciae2e05d85d0c93,
  title = {Map showing unconsolidated materials, Palmer quadrangle, Massachusetts},
  author = {J. D. Peper},
  year = {1977},
  doi = {10.3133/mf911a},
  url = {https://pubs.usgs.gov/publication/mf911A},
  note = {Source identifier: mf911A}
}