@misc{indiciae8ea1cfd26d9a,
  title = {A simple morphometric method to distinguish tule and Pacific subspecies of greater white-fronted geese},
  author = {John Y. Takekawa and D.L. Orthmeyer},
  year = {1993},
  url = {https://pubs.usgs.gov/publication/2002247},
  note = {Source identifier: 2002247}
}