@article {3198,
	title = {Visitors{\textquoteright} Perceptions of a Trail Environment and Effects on Experiences: A Model for Nature-Based Recreation Experiences},
	journal = {Leisure Sciences},
	volume = {32},
	year = {2010},
	note = {Illustrations},
	month = {December},
	pages = {33-54},
	keywords = {Hiking, Tourism, Trail erosion},
	author = {Dorwart, Catherine Elisabeth and Moore, Roger L and Leung, Yu-Fai}
}
@inbook {2839,
	title = {Visitor Employed Photography: Its Potential and Use in Evaluting Visitors{\textquoteright} Perceptions of Resource Impacts in Trail and Park Settings},
	booktitle = {Proceedings of the 2006 Northeastern Recreation Research Symposium: 2006 April 9-11: Bolton Landing, NY. Ge. Tech. Rep. NRS-P-14},
	year = {2007},
	pages = {307-315},
	publisher = {U.S. Department of Agriculture, Forest Service, Northern Research Station},
	organization = {U.S. Department of Agriculture, Forest Service, Northern Research Station},
	address = {Newton Square, PA},
	keywords = {Appalachian Trail, Hiking, Tourism},
	url = {http://nrs.fs.fed.us/pubs/gtr/gtr_nrs-p-14/41-dorwart-p-14.pdf},
	author = {Dorwart, Catherine Elisabeth and Moore, Roger L and Leung, Yu-Fai},
	editor = {Burns, R. and Robinson, K.}
}
@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}
}
@article {3522,
	title = {Characterizing Backcountry Camping Impacts in Great Smoky Mountains National Park, USA},
	journal = {Journal of Environmental Management},
	volume = {57},
	year = {1999},
	month = {November},
	pages = {193-203},
	keywords = {Camping, Conservation},
	author = {Leung, Yu-Fai and Marion, Jeffrey L}
}
@article {3520,
	title = {The Influence of Sampling Interval on the Accuracy of Trail Impact Assessment},
	journal = {Landscape and Urban Planning},
	volume = {43},
	year = {1999},
	month = {January},
	pages = {167-179},
	keywords = {Trail erosion, Trail maintenance},
	author = {Leung, Yu-Fai and Marion, Jeffrey L}
}
@book {11788,
	title = {An Assessment of Campsite Conditions in Great Smoky Mountains National Park},
	series = {Research/Resources Management Report},
	year = {1997},
	note = {Illustrations},
	pages = {127},
	publisher = {U. S. Department of the Interior, National Park Service },
	organization = {U. S. Department of the Interior, National Park Service },
	keywords = {Camping, Recreation},
	author = {Marion, Jeffrey L and Leung, Yu-Fai}
}
