@book{2147,
	author = {Steel, Robert G D and Torrie, James H},
	title = {Bioestadística :},
	publisher = {McGraw-Hill,},
	year = {1980.},
	address = {México :},
	edition = {2a. ed. --},
	note = {Título en Inglés: Principles and Procedures of Estatistics: a Biometral Approach.}
}