por Creighton, Hamburg Planning Consultants (E.U.A.) | E.U.A. National Research Council. Highway Research Board.
por Sagar, Navin S | National Research Council. Transportation Research Board (E-.U.A.).
por Cohen, J. W.
por National Research. Transportation Research Board (E.U.A.).
por E.U.A. National Research Council. Highway Research Board.
por Kulpa, John S | Schwartz, Arthur D., coaut | E. U. A. National Research Council. Transportation Research- Board.
por Krinitzsky, Ellis L | Chang, Frank K., coaut.