@misc{indiciaeb1615c147cab,
  title = {Wintering bald eagles in the Grand Canyon: 1993-1994},
  author = {M. K. Sogge and Timothy J. Tibbitts},
  year = {1994},
  url = {https://pubs.usgs.gov/publication/70129537},
  note = {Source identifier: 70129537}
}