@book{9274,
	author = {Hoel, Paul Gerhard,},
	title = {Introduction to mathematical statistics / },
	publisher = {Wiley,},
	year = {c1971.},
	address = {New York :},
	edition = {4th ed.},
	note = {Includes Index. },
	url = {http://www.loc.gov/catdir/enhancements/fy0607/70139277-d.html}
}