National Research Council (U.S.). Highway Research Board, National Research Council (U.S.). Highway Research Board. Meeting, & National Research Council (U.S.). Committee on Visibility. (1972). Visibility: 11 reports. Highway Research Board.
Citace podle Chicago (17th ed.)National Research Council (U.S.). Highway Research Board, National Research Council (U.S.). Highway Research Board. Meeting, a National Research Council (U.S.). Committee on Visibility. Visibility: 11 Reports. Washington, D.C: Highway Research Board, 1972.
Citace podle MLA (9th ed.)National Research Council (U.S.). Highway Research Board, et al. Visibility: 11 Reports. Highway Research Board, 1972.
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