(3ebGeGJ GdMQjQj GdeUhQI (B: s (3OQGSI JGQjNjI GKQjI afjI (B/ s - (3GdfYjej , fGgOI YHO GdaJGM s ((3HZOGO (B: s (3OGQ GdQTjO ddfTQ , s, 1979)
Keywords: (3GdGOH GdYQHj s