(3GdCOZGd (B/ s - (3SHjQj, CQeSJQhfLs; (3GdeQSj, Ydj Ydjs ((3GdbGgQI (B:s (3OGQ GdeYGQa,s, 1989)
Keywords: (3GdZGHGJ hGdJMQjLs