@misc{indiciae785c7cf67585,
  title = {Reproduction in mallards fed selenium},
  author = {G. H. Heinz and D. J. Hoffman and A. J. Krynitsky and D.M.G. Weller},
  year = {1987},
  doi = {10.1002/etc.5620060603},
  url = {https://pubs.usgs.gov/publication/5222190},
  note = {Source identifier: 5222190}
}