@misc{indiciaed57863f7b5e6,
  title = {How much habitat management is needed to meet mallard production objectives?},
  author = {L.M. Cowardin and T.L. Shaffer and K.M. Kraft},
  year = {1995},
  url = {https://pubs.usgs.gov/publication/1001188},
  note = {Source identifier: 1001188}
}