@book{164612,
	author = {Pardo de Vélez, Graciela. and Cedeño Collazos, Marlene.},
	title = {Investigación en salud},
	publisher = {McGraw-Hill},
	year = {c1997.},
	address = {Santafé de Bogotá},
	note = {Includes bibliographical references and index.}
}