(3JfHjg GdZGadjf (B/ s - (3GdSeQbfOj, CHh GddjK fUQ Hf eMeOs; (3Gdhcjd, YHO GdYRjR eMeOs ((3LOI (B:s (3OGQ GdTQhb,s, 1980)
(3EYJeO L(B2 (3aj GdhUa GdHjHdhZQGajs
Keywords: (3GdESdGe(B. s; (3GdMOjK GdfHhj(B. s