@misc{indiciae28324f065cc0,
  title = {Geographic variation in the song of Willow Flycatchers: Differentiation between Empidonax traillii adastus and E. t. extimus},
  author = {J.A. Sedgwick},
  year = {2001},
  doi = {10.1642/0004-8038(2001)118[0366:gvitso]2.0.co;2},
  url = {https://pubs.usgs.gov/publication/1015200},
  note = {Source identifier: 1015200}
}