@misc{indiciae1641184fc824,
  title = {Some considerations in modeling the mallard life cycle},
  author = {Douglas H. Johnson and J.D. Nichols and M.J. Conroy and L.M. Cowardin},
  year = {1988},
  url = {https://pubs.usgs.gov/publication/85378},
  note = {Source identifier: 85378}
}