@misc{indiciaeee69737207d5,
  title = {[Book review] Speciation and geographic variation in black-tailed gnatcatchers, by J. Atwood},
  author = {Richard C. Banks},
  year = {1989},
  url = {https://pubs.usgs.gov/publication/5223518},
  note = {Source identifier: 5223518}
}