@misc{indiciae59de2ad7fa8f,
  title = {Use of ultralight aircraft for introducing migratory crane populations},
  author = {Kent R. Clegg and J. C. Lewis and D. H. Ellis},
  year = {1997},
  url = {https://pubs.usgs.gov/publication/5210915},
  note = {Source identifier: 5210915}
}