@book{13136,
	author = {Downie, N. M. and Heath, R. W.},
	title = {Basic statistical methods /},
	publisher = {Harpercollins College Div,},
	year = {1983.},
	address = {[S.l.] :},
	edition = {5 Sub ed.},
	url = {http://www.amazon.com/exec/obidos/ASIN/0060417285/chopaconline-20}
}