@misc{indiciae2ca2d1703b28,
  title = {An overview of the Valles Caldera National Preserve: the natural and cultural resources},
  author = {Robert R. Parmenter and Anastasia Steffen and Craig D. Allen},
  year = {2007},
  url = {https://pubs.usgs.gov/publication/70176090},
  note = {Source identifier: 70176090}
}