Quizá quiso decir: SOMALIA HISTORIA 1991- Lecture Notes in Mathematics, 0075-8434 ; 1991 Frisch, Max, 1911-1991 Crítica e interpretación. Frisch, Max, 1911-1991. Criticism and interpretation. Rusia (República) Relaciones internacionales Ucrania 1991-1997. UcraniaxRelaciones internacionales Rusia (República) 1991-1997. Caballero, José, 1915-1991. Yugoslav war, 1991-1995 Participation, Foreign. Yugoslav War, 1991-1995. Cuento español 1991-2000. Zambrano, María, 1904-1991 Criticism and interpretation. Russia (Federation) Politics and government 1991-. Asia, Central Politics and government 1991-. Kazakhstan Politics and government 1991-. Mali Politics and government 1991-. Soviet Union Politics and government 1985-1991. Ukraine History 1991-. Mercury, Freddie, 1946-1991. Lubac, Henri de, 1896-1991. Frisch, Max, 1911-1991 Cr�itica e interpretaci�on.