@book{32073,
	author = {Weeks, John R.},
	title = {Population : an introduction to concepts and issues /},
	publisher = {Wadsworth/Thomson Learning,},
	year = {2002},
	address = {Belmont. CA :},
	edition = {8th ed.},
	url = {http://10.13.12.226/cgi-bin/image_eng/Cover_page/0534529763.gif}
}