@misc{indiciaee4f776936776,
  title = {A double survey estimate for sighting probability of sea otters in California},
  author = {James A. Estes and Ronald J. Jameson},
  year = {1988},
  doi = {10.2307/3801061},
  url = {https://pubs.usgs.gov/publication/1007794},
  note = {Source identifier: 1007794}
}