@misc{indiciae7bce2d445980,
  title = {Fertility of eggs produced on territories of vasectomized red-winged blackbirds},
  author = {Olin E. Bray and James J. Kennelly and Joseph L. Guarino},
  year = {1975},
  url = {https://pubs.usgs.gov/publication/70210083},
  note = {Source identifier: 70210083}
}