CREATE TABLE table_45908 ("Winner" TEXT, "Country" TEXT, "Winter Olympics" TEXT, "FIS Nordic World Ski Championships" TEXT, "Holmenkollen" TEXT)

Which Country has a FIS Nordic World Ski Championships of 1948, 1950?
SELECT "Country" FROM table_45908 WHERE "FIS Nordic World Ski Championships" = '1948, 1950'
SELECT "Country" FROM "table_45908" WHERE "FIS Nordic World Ski Championships" = '1948, 1950'