@misc{indiciae8f7ab5eaaa08,
  title = {2020 National Park Visitor Spending Effects Economic Contributions to Local Communities, States,and the Nation},
  author = {Catherine Cullinane Thomas and Lynne Koontz},
  year = {2021},
  url = {https://pubs.usgs.gov/publication/70222049},
  note = {Source identifier: 70222049}
}