@book{97695,
	author = {Townsend, Colin R. and Begon, Michael},
	title = {Essentials of ecology /},
	publisher = {Blackwell Pub.,},
	year = {2003.},
	address = {Malden, MA :},
	edition = {2nd ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy0805/2002003801-b.html}
}