@misc{indiciae767d12456f0c,
  title = {Avian surveys of large geographical areas: A systematic approach},
  author = {J. M. Scott and J.D. Jacobi and F. L. Ramsey},
  year = {1981},
  url = {https://pubs.usgs.gov/publication/5221650},
  note = {Source identifier: 5221650}
}