@misc{indiciaeb255fa6b3237,
  title = {Invertebrate trace fos­sils; the backbone of continental ichnology},
  author = {S.T. Hasiotis and T. M. Bown},
  year = {1992},
  url = {https://pubs.usgs.gov/publication/70186659},
  note = {Source identifier: 70186659}
}