@book{29993,
	author = {Gliessman, Stephen R.},
	title = {Agroecology :},
	publisher = {CRC Press,},
	year = {c2007.},
	address = {Boca Raton :},
	edition = {2nd ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy0701/2006042923-d.html}
}