@book{119626,
	author = {Zetterberg, Hans Lennart},
	title = {teoría y verificación en sociología.},
	publisher = {Ediciones Nueva Visión},
	year = {1973},
	series = {Cuadernos de investigación social},
	address = {Buenos Aires},
	edition = {3. ed.},
	note = {Translation of : On theory and verification in sociology.}
}