(3eLdI gjFI bVGjG GdOhdI(B.s (3GdSfI GdQGHYI hGdKdGKhf (B- (3GdYOO GdKGdK (B1990 /s ((3GdbGgQI (B:s (3gjFI bVGjG GdOhdI GdeUQjI,s, 1990)
(3jhdjh (B/ (3SHJeHQ (B1990.s
Keywords: (3GdbGfhf GdEOGQjs -- (3OhQjGJs