@book{137319,
	author = {Gould, James L., and Gould, Carol Grant. and ebrary, Inc.},
	title = {Nature's compass},
	publisher = {Princeton University Press,},
	year = {c2012.},
	series = {Science essentials},
	address = {Princeton :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10546809}
}