Ezkerra y la disolución de ETA político-militar (1976-1985), en Sancho el sabio. Revista de cultura e investigación vasca, ISSN 1131-5350, Nº 33, 2010, pp. 55–96 Political parties established in 1977 1977 establishments in Spain Political parties disestablished in 1991 1991 disestablishments in Spain Political parties in the Basque Country (autonomous community) Basque history Defunct socialist parties in the Basque Country (autonomous community) Defunct nationalist parties in Spain Left-wing nationalist parties