@misc{indiciaedfbd8878cfa1,
  title = {Alula removal technique for identifying wings of released waterfowl},
  author = {G.V. Burger and R. J. Greenwood and R.C. Oldenburg},
  year = {1970},
  doi = {10.2307/3799500},
  url = {https://pubs.usgs.gov/publication/1001521},
  note = {Source identifier: 1001521}
}