@misc{indiciaed2e0942a68ce,
  title = {Hawk migration over White Marsh, Maryland},
  author = {C.D. Hackman and Charles J. Henny},
  year = {1971},
  doi = {10.2307/1350773},
  url = {https://pubs.usgs.gov/publication/5220637},
  note = {Source identifier: 5220637}
}