@misc{indiciae923f812fb3e6,
  title = {Reports and maps of the Geological Survey released only in the open files, January through April, 1974},
  author = {Betsy A. Weld and Kathleen T. Iseri and Gary W. Horton},
  year = {1975},
  doi = {10.3133/cir706},
  url = {https://pubs.usgs.gov/publication/cir706},
  note = {Source identifier: cir706}
}