@book{125539,
	author = {Hrdy, Sarah Blaffer,},
	title = {Mothers and others :},
	publisher = {Belknap Press of Harvard University Press,},
	year = {2009.},
	address = {Cambridge, Mass. :},
	url = {http://www.loc.gov/catdir/toc/fy0905/2008052936.html}
}