@misc{indiciae331c40eea78c,
  title = {Sex identification of polar bears from blood and tissue samples},
  author = {Steven C. Amstrup and G.W. Garner and M. A. Cronin and J.C. Patton},
  year = {1993},
  doi = {10.1139/z93-305},
  url = {https://pubs.usgs.gov/publication/70181818},
  note = {Source identifier: 70181818}
}