@book{2014,
	author = {Cochran, William Gemmell,},
	title = {Sampling techniques /},
	publisher = {John Wiley,},
	year = {c2005.},
	series = {Wiley series in probability and mathematical statistics},
	address = {New York :},
	edition = {3rd ed.},
	note = {Includes index.}
}