@misc{indiciae893dc5a3eb87,
  title = {Preliminary map showing the winter distribution of the clapper rail (Rallus longirostris subsp.) in the United States},
  author = {C.S. Robbins},
  year = {1950},
  url = {https://pubs.usgs.gov/publication/5220299},
  note = {Source identifier: 5220299}
}