@misc{indiciaee6d75d5adc38,
  title = {Mallard hatching from an egg cracked by freezing},
  author = {R. J. Greenwood},
  year = {1969},
  doi = {10.2307/4083468},
  url = {https://pubs.usgs.gov/publication/1001601},
  note = {Source identifier: 1001601}
}