@misc{indiciaec5841e7720c9,
  title = {Pollen zonation and correlation of Maastrichtian marine beds and associated strata, Ocean Point dinosaur locality, North Slope, Alaska},
  author = {Norman O. Frederiksen},
  year = {1991},
  doi = {10.3133/b1990e},
  url = {https://pubs.usgs.gov/publication/b1990E},
  note = {Source identifier: b1990E}
}