@misc{indiciaea8b218a7725f,
  title = {Polar bear maternity denning in the Beaufort Sea},
  author = {Steven C. Amstrup and Craig L. Gardner},
  year = {1994},
  doi = {10.2307/3809542},
  url = {https://pubs.usgs.gov/publication/1012838},
  note = {Source identifier: 1012838}
}