@article {3521,
	title = {Assessing Trail Conditions in Protected Areas: Application of a Problem-Assessment Method in Great Smoky Mountains National Park, USA},
	journal = {Environmental Conservation},
	volume = {26},
	year = {1999},
	month = {December},
	pages = {270-279},
	keywords = {Conservation, Tourism, Trail erosion, Trail maintenance},
	url = {http://parks.ca.gov/pages/1324/files/f19902\%20leung\&marion.pdf},
	author = {Leung, Yu-Fai and Marion, Jeffrey L}
}
