por National Research Council. Transportation Research Board ( -E.U.A.).
por E.U.A. National Research Council. Highway Research Board.
por National Research Council. Highway Research Board (E.U.A.).
por Permanent International Association of Road Congresses.National Research Council. Transportation Research Board (E-.U.A.) | Harold-halm international symposium on concrete pavement co-nstruction (1988 : Washington, D.C.).Piarc world road congress-construction and maintenance of r-igid pavements (18th : 1987 : Bruselas, Belgica).
por American Concrete Institute.