TY  - RPRT
TI  - Assessing recreation impacts to cliffs in Shenandoah National Park: Integrating visitor observation with trail and recreation site measurements
AU  - K.T. Wood
AU  - S.R. Lawson
AU  - J. L. Marion
PY  - 2006
UR  - https://pubs.usgs.gov/publication/5224728
ID  - 5224728
ER  -