@misc{indiciaea8be2bbe6417,
  title = {Carboniferous biostratigraphy, northeastern Brooks Range, Arctic Alaska},
  author = {Augustus K. Armstrong and Bernard L. Mamet},
  year = {1975},
  doi = {10.3133/pp884},
  url = {https://pubs.usgs.gov/publication/pp884},
  note = {Source identifier: pp884}
}