@misc{indiciaef5ad20a17a39,
  title = {Acute gastric dilatation and volvulus in a free-living polar bear},
  author = {Steven C. Amstrup and Carol A. Nielsen},
  year = {1989},
  doi = {10.7589/0090-3558-25.4.601},
  url = {https://pubs.usgs.gov/publication/70184274},
  note = {Source identifier: 70184274}
}