(3SdWGJ GdCef hGdMUGfGJ hGdGeJjGRGJ GdOHdheGSjI (B:s (3ai GdhGbY GdfXQi hGdYedi ebGQfG HGdTQjYI GdESdGejI (B/s - (3aGOi GdedGMs ((3GdGScfOQjI (B:s (3efTCI GdeYGQa,s, 1981)
.767 -732 (3HHdjhLQGajG(B: (3UaMI(B.s
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdOHdheGSjI hGdSdc GdOHdheGSis; (3GdbGfhf GdOhdj GdYGes