por Hancher, Donn E | Burke, Dock, coaut.Goff, Zane, coaut | National Research Council. Transportation Research Board (E-.U.A.).
por Oesterle, R.G | Glikin, J.D., coaut.Larson, S.C., coaut | National Research Council. Transportation Research Board (E-.U.A.).
por Israelsen, C.E., coaut | National Research Council. Transportation Research Board (E-.U.A.).
por Anderson, David A | Luhr, David R., coaut.Antle, Charles E., coaut | National Research Council. Transportation Research Board (E-.U.A.).
por Kobriger, N.P., coaut | National Research Council. Transportation Research Board (E-.U.A.).
por Koenig, R.A | Taylor, J.P., coaut | National Research Council. Transportation Research Board (E-.U.A.).