@misc{indiciaef7cffd25bc19,
  title = {Interim geologic map of the Shirley Quadrangle, Massachusetts},
  author = {Susan Lorraine Russell and Richard Waldron Allmendinger},
  year = {1976},
  doi = {10.3133/ofr76267},
  url = {https://pubs.usgs.gov/publication/ofr76267},
  note = {Source identifier: ofr76267}
}