@misc{indiciae44ef116d74b3,
  title = {Early Triassic (Smithian) ammonites of paleoequatorial affinity from the Chulitna terrane, south-central Alaska},
  author = {K. M. Nichols and Norman J. Silberling},
  year = {1979},
  doi = {10.3133/pp1121b},
  url = {https://pubs.usgs.gov/publication/pp1121B},
  note = {Source identifier: pp1121B}
}