@misc{indiciae9f6957519290,
  title = {Migration behavior of tundra swans from the Yukon-Kuskokwim Delta, Alaska},
  author = {Craig R. Ely and David C. Douglas and A. C. Fowler and Colleen A. Babcock and D.V. Derksen and John Y. Takekawa},
  year = {1997},
  url = {https://pubs.usgs.gov/publication/1008141},
  note = {Source identifier: 1008141}
}