TY  - RPRT
TI  - Assessing trail conditions in protected areas: Application of a problem-assessment method in Great Smoky Mountains National Park, USA
AU  - Yu-Fai Leung
AU  - Jeffrey L. Marion
PY  - 2002
DO  - 10.1017/s0376892999000399
UR  - https://pubs.usgs.gov/publication/5223928
ID  - 5223928
ER  -