@misc{indiciae0c5fe311039e,
  title = {Aggressive encounters between tundra swans and greater white-fronted geese during brood rearing},
  author = {Craig R. Ely and David A. Budeau and Una G. Swain},
  year = {1987},
  doi = {10.2307/1368496},
  url = {https://pubs.usgs.gov/publication/70182082},
  note = {Source identifier: 70182082}
}