@misc{indiciaeb6b67ab86174,
  title = {Bedrock geology of the Williamsburg quadrangle, Massachusetts},
  author = {Max Emery Willard},
  year = {1956},
  doi = {10.3133/gq85},
  url = {https://pubs.usgs.gov/publication/gq85},
  note = {Source identifier: gq85}
}