(3eYGgOGJ GdSdGe aj GdbGfhf GdOhdj GdYGe (B/s - (3eMSf Ydj LGOs ([(3ecGf GdfTQ ZjQ eMOO(B] :s [(3GdfGTQ ZjQ eMOO(B](3,s, 1987)
. 1006-963 (3HHdjhLQGajG(B: (3UaMGJ(B.s
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdeYGgOGJ GdOhdjIs; (3GdbGfhf GdOhdj GdYGes