@book{60720,
	author = {Shenk, Tanya M.},
	title = {Modeling in natural resource management :},
	publisher = {Island Press,},
	year = {c2001.},
	address = {Washington, DC :},
	url = {http://www.loc.gov/catdir/enhancements/fy0666/00012956-d.html}
}