(3Yde GdHjGf (B: s (3OQGSI JGQjNjI afjI aj CUhd GdHdGZI GdYQHjI (B/ s - (3WHGfg, HOhjs ((3GdbGgQI (B:s (3ecJHI GdCfLdh GdeUQjI,s, 1977)
Keywords: (3GddZI GdYQHjIs; (3bhGYO GddZIs; (3GdJGQjN GdCOHjs