(3fOGA GdbQBf GdcQje (B/s - (3Ydi RgQGfs; (3eMeO Jhajb YhjVIs ((3GdbGgQI (B:s (3eWGHY GdCgQGe GdJLGQjI,s, 1972)
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdbQBf GdcQje hGdYdhe GdbQBfjIs; (3GdTQjYI GdESdGejIs