@misc{indiciaeaa1a2623cc83,
  title = {Gender identification of Caspian Terns using external morphology and discriminant function analysis},
  author = {Joshua T. Ackerman and John Y. Takekawa and J.D. Bluso and J.L. Yee and Collin A. Eagles-Smith},
  year = {2008},
  doi = {10.1676/07-061.1},
  url = {https://pubs.usgs.gov/publication/70031921},
  note = {Source identifier: 70031921}
}