@misc{indiciae460c1af5f751,
  title = {2018 National Park visitor spending effects: Economic contributions to local communities, states, and the nation},
  author = {Catherine Cullinane Thomas and Lynne Koontz and Egan Cornachione},
  year = {2019},
  url = {https://pubs.usgs.gov/publication/70204071},
  note = {Source identifier: 70204071}
}