@misc{indiciae2498b826656a,
  title = {Herons and their allies: Atlas of Atlantic Coast colonies, 1975 and 1976},
  author = {R. G. Osborn and T. W. Custer},
  year = {1978},
  url = {https://pubs.usgs.gov/publication/5230187},
  note = {Source identifier: 5230187}
}