@misc{indiciae61cf86ed731b,
  title = {A sexing technique for California Gulls breeding at Bamforth Lake, Wyoming (Una tecnica para determinar sexos en larus californicus reproduciendose en el Lago Bamforth, Wyoming)},
  author = {Bruce H. Pugesek},
  year = {1996},
  url = {https://pubs.usgs.gov/publication/70203882},
  note = {Source identifier: 70203882}
}