@misc{indiciae41c5251e8a58,
  title = {Ordovician and Silurian graptolite discoveries from the Neruokpuk Formation (sensu lato), northeastern and central Brooks Range, Alaska},
  author = {Thomas E. Moore and Michael Churkin},
  year = {1984},
  url = {https://pubs.usgs.gov/publication/70197308},
  note = {Source identifier: 70197308}
}