@misc{indiciae945d9f6268df,
  title = {Principal facts for gravity stations in part of west-central Massachusetts},
  author = {H. R. Burger},
  year = {1984},
  doi = {10.3133/ofr84636},
  url = {https://pubs.usgs.gov/publication/ofr84636},
  note = {Source identifier: ofr84636}
}