@misc{indiciae91d6e3234592,
  title = {Principal facts for gravity stations in Hampden and Hampshire Counties, Southwest Massachusetts},
  author = {K. R. Bond and J. D. Phillips},
  year = {1986},
  doi = {10.3133/ofr86218},
  url = {https://pubs.usgs.gov/publication/ofr86218},
  note = {Source identifier: ofr86218}
}