@book{54889,
	author = {López Pina, Antonio},
	title = {Estructuras electorales contemporáneas},
	publisher = {Editorial Tecnos},
	year = {1970.},
	series = {Semilla y surco. Colección de ciencias sociales. Serie de ciencia política},
	address = {Madrid},
	note = {Includes bibliographical references.}
}