@misc{indiciae9ade5c6771dd,
  title = {Line transect estimation of bird population density using a Fourier series},
  author = {Jeffrey L. Laake and Kenneth P. Burnham and David R. Anderson},
  year = {1981},
  url = {https://pubs.usgs.gov/publication/70120220},
  note = {Source identifier: 70120220}
}