@misc{indiciae9ecb5075beba,
  title = {Surficial geology of the Concord quadrangle, Massachusetts},
  author = {Carl Koteff},
  year = {1964},
  doi = {10.3133/gq331},
  url = {https://pubs.usgs.gov/publication/gq331},
  note = {Source identifier: gq331}
}