(3GdJCKjQ GdeJHGOd Hjf GdJbOe GdYdej hGdJcfhdhLj hGdbGfhf GdOhdj GdYGe (B/ s - (3eUWai SdGeI MSjf(B.s ((3GdbGgQI (B: s (3OGQ GdfgVI GdYQHjI, s, 1990)
Keywords: (3GdbGfhf GdOhdj GdYGe(B.s; (3GdJcfhdhLjG(B.s; (3GdJbOe GdYdej(B.s