@misc{indiciae3bdd2985d29a,
  title = {Geology and mineral resources of the Hudson and Maynard quadrangles, Massachusetts},
  author = {Wallace R. Hansen},
  year = {1956},
  doi = {10.3133/b1038},
  url = {https://pubs.usgs.gov/publication/b1038},
  note = {Source identifier: b1038}
}