@misc{indiciae3fe21c8841ed,
  title = {Estimating survival rates with age-structure data},
  author = {Mark S. Udevitz and Brenda E. Ballachey},
  year = {1998},
  doi = {10.2307/3802355},
  url = {https://pubs.usgs.gov/publication/70020396},
  note = {Source identifier: 70020396}
}