@misc{indiciaef52aff8ed180,
  title = {Distance sampling for Sonoran Desert tortoises},
  author = {Don E. Swann and Roy C. Averill-Murray and Cecil R. Schwalbe},
  year = {2002},
  doi = {10.2307/3802929},
  url = {https://pubs.usgs.gov/publication/70024320},
  note = {Source identifier: 70024320}
}