@misc{indiciae35bc80e71b23,
  title = {Bibliography of North American geology, 1968},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1971},
  doi = {10.3133/b1268},
  url = {https://pubs.usgs.gov/publication/b1268},
  note = {Source identifier: b1268}
}