@misc{indiciae7233ce7974fe,
  title = {Revised correlation of Silurian Provincial Series of North America with global and regional chronostratigraphic units and δ 13 C carb chemostratigraphy},
  author = {Bradley D. Cramer and Carlton E. Brett and Michael J. Melchin and Peep Mannik and Mark A. Kleffner and Patrick I. McLaughlin and David K. Loydell and Axel Munnecke and Lennart Jeppsson and Carlo Corradini and Frank R. Brunton and Matthew R. Saltzman},
  year = {2011},
  doi = {10.1111/j.1502-3931.2010.00234.x},
  url = {https://pubs.usgs.gov/publication/70034024},
  note = {Source identifier: 70034024}
}