@misc{indiciaeb3bd94794f0f,
  title = {Survey Designs and Statistical Methods for the Estimation of Avian Population Trends},
  author = {J.R. Sauer and Sam Droege},
  year = {1990},
  url = {https://pubs.usgs.gov/publication/5230211},
  note = {Source identifier: 5230211}
}