@book{30898,
	author = {Hodge, M. J. S. (Michael Jonathan Sessions), and Hodge, M. J. S.},
	title = {The Cambridge companion to Darwin /},
	publisher = {Cambridge University Press,},
	year = {2009.},
	address = {Cambridge ;},
	edition = {2nd ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy0903/2008038888-t.html}
}