@misc{indiciae47c72c448b36,
  title = {Surficial geologic map of the Shrewsbury quadrangle, Worcester County, Massachusetts},
  author = {Charles E. Shaw},
  year = {1969},
  doi = {10.3133/gq794},
  url = {https://pubs.usgs.gov/publication/gq794},
  note = {Source identifier: gq794}
}