@misc{indiciae495be4a1f84e,
  title = {Pollen from Leda clay of Maine},
  author = {A.S. Knox},
  year = {1956},
  doi = {10.1126/science.123.3208.1118.b},
  url = {https://pubs.usgs.gov/publication/70010589},
  note = {Source identifier: 70010589}
}