(3GdGYdGe hgLQI GdeUQjjf(B: (3OQGSI ai GdOhQ GdJfehi ddGYdGe (B/ s - (3YHOGdaJGM YHOGdfHis ([S.N] : (3ecJHI GdfgVI GdeUQjI , s, 1989)
Keywords: (3GdYdGbGJ GdYGeIs; (3GdGJUGds; (3GdGYdGes; (3GdOYGjIs; (3hSGFd GdGYdGes; (3GdQGi GdYGes