@misc{indiciae846a7a1715e9,
  title = {Reports and maps of the Geological Survey released only in the open files, 1961},
  author = {Betsy A. Weld and Erwin S. Asselstine and Arthur Johnson},
  year = {1962},
  doi = {10.3133/cir463},
  url = {https://pubs.usgs.gov/publication/cir463},
  note = {Source identifier: cir463}
}