@misc{indiciaed766f7e36293,
  title = {Reliability of kill and activity estimates in the U.S. waterfowl hunter survey},
  author = {Leigh M. Couling and A.R. Sen and Elwood M. Martin},
  year = {1982},
  url = {https://pubs.usgs.gov/publication/ssrw240},
  note = {Source identifier: ssrw240}
}