(3KeQGJ GdGhQGb (B/ s - (3GHf MLI GdMehi (B: (3Jbi GdOjf GHhHcQ Hf Ydi Hf eMeO GdGRQGQis; (3eMeO GHhGdaVd GHQGgjes ((3GdbGgQI (B: s (3ecJHI GdNGfLi , s, 1971)
Keywords: (3GdGOH GdYQHis; (3GdfhGOQGdYQHjIs; (3GdJGQjN GdGSdGeis