(3eTQhY eMceI GdYOd GdYQHjI (B/s - (3eMeO GdMSjfj eUjdMjs ((3GdQjGV (B:s (3GdeQcR GdYQHjI ddOQGSGJ GdCefjI hGdJOQjH,s, 1991)
(3jTJed Ydj edGMbs
. 60-59 (3HHdjhLQGajG(B: (3UaMGJ(B.s
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdeMGce GdOhdjIs; (3GdbGfhf GdOhdj GdYGes