@book{555,
	title = {Crónica del Siglo XX : 1900-1999},
	publisher = {Perfil. Noticias },
	note = {CD1:1900-1909, CD2: 1910-1919, CD3: 1920-1929; CD4: 1930-1939; CD5: 1940-1949; CD6: 1950-1959, CD7: 1960-1969, CD8: 1970-1979, CD9: 1980-1989}
}