@book{601,
	author = {Johnson, George B.},
	title = {The living world /},
	publisher = {McGraw-Hill Higher Education,},
	year = {c2006.},
	address = {New York, NY :},
	edition = {4th ed.},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/enhancements/fy0616/2004018236-d.html}
}