@misc{indiciae0388f17b4074,
  title = {Autographic theme extraction},
  author = {D. Edson and Alden P. Colvocoresses},
  year = {1973},
  doi = {10.3133/7000079},
  url = {https://pubs.usgs.gov/publication/7000079},
  note = {Source identifier: 7000079}
}