@misc{indiciaea9c4e117e65c,
  title = {Viable populations},
  author = {P. A. Buckley and W. Ehorn and M. Gilpin and J. Hamrick and C. Schonewald-Cox and M. Shaffer and T. Simons},
  year = {1990},
  url = {https://pubs.usgs.gov/publication/5210836},
  note = {Source identifier: 5210836}
}