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    Studies in night visibility : presented at the thirtieth annual meeting 1951

    National Research Council, Highway Research Board, USA | TIBKAT | 1951

    Roughness and skid resistance : presented at the thirtieth annual meeting 1951

    National Research Council, Highway Research Board, USA | TIBKAT | 1951

    Reflectors and night visibility : presented at the twenty-ninth annual meeting 1949

    National Research Council, Highway Research Board, USA | TIBKAT | 1951

    Traffic surveys by post cards : presented at the thirtieth annual meeting 1951

    National Research Council, Highway Research Board, USA | TIBKAT | 1951

    Pavement marking : presented at the thirtieth annual meeting 1951

    National Research Council, Highway Research Board, USA | TIBKAT | 1951

    Pavement marking materials : presented at the thirty-first annual meeting, January 1952

    National Research Council, Highway Research Board, USA | TIBKAT | 1952

    Road-user characteristics : presented at the thirty-first annual meeting, january, 1952

    National Research Council, Highway Research Board, USA | TIBKAT | 1952

    Design of flexible pavements : presented at the thirty-third annual meeting, january 12 - 15, 1954

    National Research Council, Highway Research Board, USA | TIBKAT | 1954