@Article{155221,
     author = "Stanisław Urbańczyk",
     title = "The role of language in the history of the Polish nation ",
     year =  1985 (wyd. 1986-1987),
     volume =  4,
     number =  1,
     journal =  Acta Academiae Scientiarum Polonae,
     pages =  s. 63-70,
    }