(3GdbGfhf GdOhdj GdNGU GddjHjs - (3eMeO YHOGdNGdb YeQs ((3eUQ(B:s (3OGQ GdfgVI GdYQHjI(B,s, 1971)
. 240-220 (3HHdjhLQGajG(B: (3UaMGJ(B.s
(3GdfU CZdHg HGddZI GdYQHjI eY HYV GdfUhU GdEfLdjRjIs
Keywords: (3GdbGfhf GdOhdj GdNGUs