@book{8897,
	author = {Steel, Robert George Douglas. and Torrie, James Hiram,},
	title = {Principles and procedures of statistics :},
	publisher = {McGraw-Hill,},
	year = {c1997.},
	series = {McGraw-Hill series in probability and statistics},
	address = {New York :},
	edition = {3rd ed.},
	url = {http://www.loc.gov/catdir/description/mh022/96006766.html}
}