@misc{indiciaeb4bcbcf5c3e4,
  title = {Aerial surveys for manatees and dolphins in western peninsular Florida (with notes on sightings of sea turtles and crocodiles)},
  author = {A. Blair Irvine and John E. Caffin and Howard I. Kochman},
  year = {1981},
  url = {https://pubs.usgs.gov/publication/fwsobs80\_50},
  note = {Source identifier: fwsobs80\_50}
}