@misc{indiciae57c2dc811ec2,
  title = {Biochemical identification of mallard-black duck hybrids through a breeding program and in nature},
  author = {R.P. Morgan and D. W. Meritt and S. B. Block and M. Cole},
  year = {1978},
  url = {https://pubs.usgs.gov/publication/1001377},
  note = {Source identifier: 1001377}
}