@misc{indiciae15571e219265,
  title = {2015 National Park visitor spending effects: Economic contributions to local communities, states, and the nation},
  author = {Catherine M. Cullinane Thomas and Lynne Koontz},
  year = {2016},
  url = {https://pubs.usgs.gov/publication/70179162},
  note = {Source identifier: 70179162}
}