@misc{indiciaea4ddf2dc1906,
  title = {Geologic interpretations of seismic data for various locations in Topsfield, Massachusetts},
  author = {James E. Maynard and Daniel Linehan},
  year = {1949},
  doi = {10.3133/ofr4939},
  url = {https://pubs.usgs.gov/publication/ofr4939},
  note = {Source identifier: ofr4939}
}