@misc{indiciaed56ca4df3e0d,
  title = {Some observations on the behavior of captive bald eagles before and during incubation},
  author = {P.N. Gerrard and Stanley N. Wiemeyer and J.M. Gerrard},
  year = {1979},
  url = {https://pubs.usgs.gov/publication/5220791},
  note = {Source identifier: 5220791}
}