@book{4985,
	author = {Martin, Robert Eugene, and Pine, Ronald H.,},
	title = {A manual of mammalogy :},
	publisher = {McGraw Hill,},
	year = {c2001.},
	address = {Boston :},
	edition = {Tercera edición},
	url = {http://www.loc.gov/catdir/toc/mh021/00039414.html}
}