@misc{indiciae0b0e348fc65b,
  title = {Stratigraphic, paleoclimatic, and paleobiogeographic significance of Tertiary sporomorphs from Massachusetts},
  author = {N. O. Frederiksen},
  year = {1984},
  doi = {10.3133/pp1308},
  url = {https://pubs.usgs.gov/publication/pp1308},
  note = {Source identifier: pp1308}
}