(3GdJbGYO (B/s - (3Hf UfjJGf, eMeOs ((3GdQjGV (B:s (3GdeQcR GdYQHj ddOQGSGJ GdCefjI hGdJOQjH,s, 1991)
(3HHdjhLQGajI (B: (3U(B. 193-196.s
Keywords: (3GdehXahfs -- (3JbGYOs -- (3LhGfH GLJeGYjIs