TY  - RPRT
TI  - Extent and control of resource damage due to noncompliant visitor behavior: A case study from the U.S. National Parks
AU  - Darryll R. Johnson
AU  - Mark E. Vande Kamp
PY  - 1996
UR  - https://pubs.usgs.gov/publication/70240679
ID  - 70240679
ER  -