@misc{indiciae3eb39ef0973d,
  title = {Birds of Isle Royale in Lake Superior},
  author = {Laurits W. Krefting and Forrest B. Lee and Philip C. Shelton and Karl T. Gilbert},
  year = {1966},
  url = {https://pubs.usgs.gov/publication/ssrw94},
  note = {Source identifier: ssrw94}
}