@misc{indiciae5a3be381740e,
  title = {A field comparison of nested grid and trapping web density estimators},
  author = {David A. Jett and J.D. Nichols},
  year = {1987},
  doi = {10.2307/1381576},
  url = {https://pubs.usgs.gov/publication/5221544},
  note = {Source identifier: 5221544}
}