@article {6862,
	title = {Developing a Natural Resource Inventory and Monitoring Program for Visitor Impacts on Recreation Sites: A Procedural Manual},
	year = {1991},
	month = {October},
	institution = {National Park Service},
	address = {Denver, CO},
	keywords = {Conservation -- Government regulations, Recreation, Tourism -- Environmental impacts, Wildlife management},
	issn = {NPS/NRVT/NRR-91/06},
	url = {http://www.wilderness.net/toolboxes/documents/recsitemonitor/MarionJ_InventorySite.pdf},
	author = {Marion, Jeffrey L}
}
