@misc{indiciaefcb9defe4b23,
  title = {Preliminary materials map of the North Adams quadrangle, Massachusetts-Vermont},
  author = {George William Holmes},
  year = {1968},
  doi = {10.3133/ofr68133},
  url = {https://pubs.usgs.gov/publication/ofr68133},
  note = {Source identifier: ofr68133}
}