(3GdeSDhdjI GdOhdjI ddOhdI aj VhA GdJTQYj h GdbVGA GdOhdjjf(B/s - (3eMeO SYGOjs ((3GdbGgQI(B:s (3OGQ GdfgVI GdYQHjI(B,s, 1990)
(3jTJed Ydj HHdjhLQGajGJs
Keywords: (3GdbGfhf GdOhdj GdYGes; (3GdeSDhdjI GdOhdjIs