@misc{indiciaef3d234202f44,
  title = {Haldane's rule and American black duck x mallard hybridization},
  author = {R.E. Kirby and G.A. Sargeant and D. Shutler},
  year = {2004},
  doi = {10.1139/z04-169},
  url = {https://pubs.usgs.gov/publication/70026539},
  note = {Source identifier: 70026539}
}