@misc{indiciae0e501d3334a0,
  title = {Bibliography of North American geology, 1949},
  author = {Emma Mertins Thom and Marjorie Hooker and R.R. Dunaven},
  year = {1951},
  doi = {10.3133/b977},
  url = {https://pubs.usgs.gov/publication/b977},
  note = {Source identifier: b977}
}