@book{18271,
	author = {Snedecor, George Waddel, and Cochran, William Gemmell,},
	title = {Statistical methods},
	publisher = {Iowa State University Press},
	year = {[1967]},
	address = {Ames,},
	edition = {6th ed.},
	note = {Previous editions published under title: Statistical methods applied to experiments in agriculture and biology.}
}