(3QSGdI (B:s (3aj GdOeGA GdWHjYjI ddfSGA (B/s - (3GdYKjejf, eMeO GdUGdMs ((3GdQjGV (B: s (3eWGHY GdhWf GdafjI,s, 1981)
Keywords: (3GdOeGA GdWHjYjI ddfSGA s