@misc{indiciae01bc0c7a6ddb,
  title = {Distribution and numbers of the California condor, 1966-1971},
  author = {S.R. Wilbur and W.D. Carrier and J.C. Borneman and R.D. Mallette},
  year = {1972},
  url = {https://pubs.usgs.gov/publication/5224748},
  note = {Source identifier: 5224748}
}