@misc{indiciae6100b05f7714,
  title = {Introduction},
  author = {James E. Fassett and J.K. Rigby},
  year = {1987},
  doi = {10.1130/spe209-p1},
  url = {https://pubs.usgs.gov/publication/70207309},
  note = {Source identifier: 70207309}
}