@misc{indiciaeafa9b8ab02d6,
  title = {Science and management in U. S. National Parks},
  author = {G.E. Davis and W. L. Halvorson and W.H. Ehorn},
  year = {1988},
  url = {https://pubs.usgs.gov/publication/1007796},
  note = {Source identifier: 1007796}
}