@misc{indiciaea2e08b93f29c,
  title = {Geology of old Hampshire County, Massachusetts, comprising Franklin, Hampshire, and Hampden Counties},
  author = {Benjamin Kendall Emerson},
  year = {1898},
  doi = {10.3133/m29},
  url = {https://pubs.usgs.gov/publication/m29},
  note = {Source identifier: m29}
}