TY  - RPRT
TI  - 2021 National park visitor spending effects: Economic contributions to local communities, states, and the nation
AU  - Catherine M. Cullinane Thomas
AU  - Matthew Flyr
AU  - Lynne Koontz
PY  - 2022
UR  - https://pubs.usgs.gov/publication/70248097
ID  - 70248097
ER  -