@misc{indiciaeec9bae1b5947,
  title = {Geologic interpretation of seismic data for various locations in Harvard and Topsfield, Masachusetts},
  author = {James E. May and Daniel Linehan},
  year = {1950},
  doi = {10.3133/ofr5046},
  url = {https://pubs.usgs.gov/publication/ofr5046},
  note = {Source identifier: ofr5046}
}