@misc{indiciae53f01804a8e9,
  title = {Development of multiple unconformities during the Devonian-Carboniferous transition on parts of Laurussia},
  author = {F.R. Ettensohn and J.C. Pashin},
  year = {1997},
  url = {https://pubs.usgs.gov/publication/70019531},
  note = {Source identifier: 70019531}
}