@misc{indiciae5275c6a065f1,
  title = {Double sampling to estimate density and population trends in birds},
  author = {Jonathan Bart and Susan L. Earnst},
  year = {2002},
  doi = {10.1642/0004-8038(2002)119[0036:dsteda]2.0.co;2},
  url = {https://pubs.usgs.gov/publication/70006409},
  note = {Source identifier: 70006409}
}