@misc{indiciae1b0d8dd22903,
  title = {Ichnology of transgressive-regressive surfaces in mixed carbonate-siliciclastic sequences, early Permian Chase Group, Oklahoma},
  author = {J.R. Chaplin},
  year = {1996},
  url = {https://pubs.usgs.gov/publication/70018627},
  note = {Source identifier: 70018627}
}