@misc{indiciaedeaa6855c3da,
  title = {DS-Software for analyzing data collected using double sampling},
  author = {Jonathan Bart and Dana Hartley},
  year = {2011},
  doi = {10.3133/ofr20111269},
  url = {https://pubs.usgs.gov/publication/ofr20111269},
  note = {Source identifier: ofr20111269}
}