por Bogdanoff, J. L | Goldberg, J. E., coaut.Schiff, A. J., coaut.
por National Research Council. Transportation Research Board (E-.U.A.).
por MacDorman, Littleton, coaut | E.U.A. National Research Council. Transportation Research B-oard.
por Miller, David R | National Research Council. Transportation Research Board (E-.U.A.).
por Chang, Frank K | Krinitzsky, Ellis, L., coaut.