(3GdQUjO GdCOHj (B: s (3eGFI ELGHI fehOLjI ehSYI aj COH GdHcGdhQjG (B/ s - (3GdCjhHj, jGSjfs; (3fLe, NQjSJhs ((3WQGHdS (B((3dHfGf(B) :s (3OGQ GdTeGd,s, 1981)
Keywords: (3GdCOH GdYQHjs; (3GdfbO GdCOHjs; (3GdTYQ GdYQHjs