@misc{indiciaeff24575540a2,
  title = {Canada geese of the Mississippi flyway with special reference to an Illinois flock},
  author = {Harold C. Hanson and Robert H. Smith},
  year = {1950},
  doi = {10.21900/j.inhs.v25.184},
  url = {https://pubs.usgs.gov/publication/70243784},
  note = {Source identifier: 70243784}
}