(3GdWYf HGdGSJFfGa (B: s (3habG dfUhU bGfhf GdeQGaYGJ eYdbG YdjgG HGQGA Gdabg h GMcGe GdbVGA (B/s - (3CMeO edjLi (B.s ((3GdbGgQI (B:s (3OGQ GdacQ GdYQHj,s, 1991)
Keywords: (3bGfhf GdeQGaYGJ(B.s; (3eMGce GdGSJFfGa(B.s; (3GdWYf ai GdGMcGe(B.s; (3ELQGAGJ GdJbGVi h GdWYhf (B.s