Washington (State). Dept. of Highways, National Research Council (U.S.). Highway Research Board. Summer meeting, & National Research Council (U.S.). Transportation Research Board. (1974). Innovations in construction and maintenance of transportation facilities: Proceedings of the sixth summer meeting of the Highway Research Board in cooperation with the Washington State Department of Highways, August 6-8, 1973, Olympia, Washington. Transportation Research Board.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWashington (State). Dept. of Highways, National Research Council (U.S.). Highway Research Board. Summer meeting, और National Research Council (U.S.). Transportation Research Board. Innovations in Construction and Maintenance of Transportation Facilities: Proceedings of the Sixth Summer Meeting of the Highway Research Board in Cooperation with the Washington State Department of Highways, August 6-8, 1973, Olympia, Washington. Washington, DC: Transportation Research Board, 1974.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWashington (State). Dept. of Highways, et al. Innovations in Construction and Maintenance of Transportation Facilities: Proceedings of the Sixth Summer Meeting of the Highway Research Board in Cooperation with the Washington State Department of Highways, August 6-8, 1973, Olympia, Washington. Transportation Research Board, 1974.