@misc{indiciae141a68b84f56,
  title = {Documentation and user's guide to the spatial environmental data digitizing system, SEDDS},
  author = {Kenneth J. Lanfear and Anastase Nakassis},
  year = {1980},
  doi = {10.3133/ofr80871},
  url = {https://pubs.usgs.gov/publication/ofr80871},
  note = {Source identifier: ofr80871}
}