@misc{indiciae681653ea16f0,
  title = {The effect of variable spring water conditions on mallard reproduction},
  author = {Gary L. Krapu and Albert T. Klett and Dennis G. Jorde},
  year = {1983},
  doi = {10.1093/auk/100.3.689},
  url = {https://pubs.usgs.gov/publication/1001537},
  note = {Source identifier: 1001537}
}