(3JGQjN eUQ ef GbOe GdYUhQ Gdi GdaJM GdaGQSi (B/ s - (3HQSJjO, LjeS gfQis; (3MSf ceGds ((3GdbGgQI (B: s (3ecJHI eOHhdi , s, 1990)
Keywords: (3eUQ GdbOjeIs; (3GdaJM GdaGQSis