@misc{indiciae3ef7887c8cfd,
  title = {Estimating age ratios and size of Pacific walrus herds on coastal haulouts using video imaging},
  author = {Daniel H. Monson and Mark S. Udevitz and Chadwick V. Jay},
  year = {2013},
  doi = {10.1371/journal.pone.0069806},
  url = {https://pubs.usgs.gov/publication/70046371},
  note = {Source identifier: 70046371}
}