@book{9239,
	author = {Zetterberg, Hans Lennart and Yujnowsky, Sibila},
	title = {Teoría y verificación en sociología/},
	publisher = {Nueva Visión,},
	year = {1981.},
	series = {Cuadernos de investigacion social},
	address = {Buenos Aires :},
	note = {Traducción de: On theory and verification in sociology}
}