(3GdYedjGJ GdeUQajI GdNGQLjI (B/ s - (3GdQGhj, NGdO hgjHs ((3YeGf (B:s (3OGQ GdefGgL ddfTQ h GdJhRjY,s, 2000)
Keywords: (3GdHfhcs; (3GdYedjGJ GdeUQajIs; (3GdHfhc GdOhdjIs; (3GdJLGQI GdOhdjIs