(3GdbGfhf GdOhdj GdYGe (B/s (3GdLRA GdChd,s (3GdfXQjGJ GdYGeI hfXQjI GdbGfhf hfXQjI GdOhdjI hGdYdGbGJ GdOhdjI (B/s - (3YHO GdYRjR SQMGfs ([(3ecGf GdfTQ ZjQ eMOO(B]s [(3GdfGTQ ZjQ eMOO(B]s, 1987)
(3jTJed Ydj GQLGYGJ HHdjhLQGajIs
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdbGfhf GdOhdj GdYGes