por National Research Council (Estados Unidos). Highway Research Board | National Research Council (Estados Unidos). Highway Research Information Service.
por National Research Council (Estados Unidos) Transportation Research Board | National Academy of Sciences (Estados Unidos) | National Academy of Engineering.
por National Research Council (Estados Unidos). Highway Research Board.
por National Research Council. Highway Research Board (E.U.A.).
por Symposium On Structure Of Portland Cement Paste And Concrete (1965 : Washington, D. C.).
por National Cooperative Highway Research Program | National Research Council (Estados Unidos). Highway Research Board | National Research Council (Estados Unidos). Transportation Research Board | Estados Unidos. Bureau of Public Roads | American Association of State Highway and Transportation Officials | Estados Unidos. Federal Highway Administration.