. . . - , 1925 - . . - . . (1937). - (1937-45), . . (1945-56), . . (1978-85), . . (1985-90). : " " . . (1946), "" . . (1949), " " . . (1972), " 1981 " . . (1986) . ( ): . . , . . , . . , . . . 1990 : . ( - ) . ( - ).