(3GdLfGjGJ aj Gdabg GdESdGej (B: s (3OQGSI ebGQfI Hjf Gdabg GdESdGej hGdbGfhf (B/ s - (3GdTGPdj, MSf YOdjs ((3GdbGgQI (B: s (3OGQ GdcJGH GdLGeYj, s, 1977)
Keywords: (3GdESdGe(B. s; (3Gdabg(B. s; (3GdYbhHGJ(B. s; (3GdbGfhf GdLfGFj(B. s