@misc{indiciae6ffabb8dbb51,
  title = {Reflexions on Frasnian and Famennian stage boundary decisions as a guide to future deliberations},
  author = {W. Ziegler and Charles Sandberg},
  year = {1995},
  doi = {10.1127/nos/33/1995/157},
  url = {https://pubs.usgs.gov/publication/70018186},
  note = {Source identifier: 70018186}
}