@misc{indiciae8044a1a3a707,
  title = {California condor survey, 1972},
  author = {R.D. Mallette and S.R. Wilbur and W.D. Carrier and J.C. Borneman},
  year = {1973},
  url = {https://pubs.usgs.gov/publication/5221122},
  note = {Source identifier: 5221122}
}