TY  - RPRT
TI  - 2012 National Park visitor spending effects: economic contributions to local communities, states, and the nation
AU  - Catherine Cullinane Thomas
AU  - Christopher C. Huber
AU  - Lynne Koontz
PY  - 2014
UR  - https://pubs.usgs.gov/publication/70099241
ID  - 70099241
ER  -