@misc{indiciaeb0b1ddb047f0,
  title = {Cavity-nesting birds and the cavity-tree resource in plains cottonwood bottomlands},
  author = {James A. Sedgwick and Fritz L. Knopf},
  year = {1986},
  doi = {10.2307/3801906},
  url = {https://pubs.usgs.gov/publication/70121261},
  note = {Source identifier: 70121261}
}