por Winfrey, Robley, 1899 [autor].
por Held, Gilbert, 1943- [autor].
por Holst, Hans von, 1946- [editor] | Nygren, Ake [editor] | Andersson, Åke E, 1936- [editor] | Karolinska Institutet | International Conference on Traffic Safety, Communication and Health (4 : 1998 : Tokio, Japon).