@misc{indiciae7435dd1e4021,
  title = {Foraminifera from the Arctic Slope of Alaska; general introduction and Part 1, Triassic foraminifera},
  author = {Helen Tappan},
  year = {1951},
  doi = {10.3133/pp236a},
  url = {https://pubs.usgs.gov/publication/pp236A},
  note = {Source identifier: pp236A}
}