(3efgL GdJQHjI aj GdJUhQ GdESdGej (B/ s - (3eOchQ, Ydj CMeOs ((3HjQhJ (B: s (3OGQ GdfgVI GdYQHjI, s, 1990)
Keywords: (3GdESdGe(B. s; (3GdJQHjI(B. s; (3GdJQHjI GdESdGejI(B. s