TY  - RPRT
TI  - Estimating visitor use and economic contributions of National Park visitor spending
AU  - Lynne Koontz
AU  - Catherine Cullinane Thomas
PY  - 2019
DO  - 10.4324/9781351055789
UR  - https://pubs.usgs.gov/publication/70210198
ID  - 70210198
ER  -