(3CUhd GdUgjhfjg aj GdOjf GdjghOj (B/ s - (3GdaGQhbj, ESeGYjd QGLjs ((3GdbGgQg (B:s (3ecJHI hgHg,s, 1988)
Keywords: (3GdjghOs; (3GdJGQjNs