@misc{indiciaea1855f111035,
  title = {An experiment with snake trapping},
  author = {L.M. Dargan and W. H. Stickel},
  year = {1949},
  doi = {10.2307/1438377},
  url = {https://pubs.usgs.gov/publication/5220684},
  note = {Source identifier: 5220684}
}