@misc{indiciae251c12ba71ad,
  title = {Surficial geologic map of the Framingham quadrangle, Middlesex and Worcester Counties, Massachusetts},
  author = {Arthur E. Nelson},
  year = {1974},
  doi = {10.3133/gq1176},
  url = {https://pubs.usgs.gov/publication/gq1176},
  note = {Source identifier: gq1176}
}