@misc{indiciae046eba7ba521,
  title = {2017 National Park visitor spending effects : Economic contributions to local communities, states, and the Nation},
  author = {Catherine M. Cullinane Thomas and Lynne Koontz and Egan Cornachione},
  year = {2018},
  url = {https://pubs.usgs.gov/publication/70197532},
  note = {Source identifier: 70197532}
}