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    Proceedings of third annual meeting of institute of traffic engineers held at Washington D.C

    Engineering Index Backfile | 1932
    Schlagwörter: Traffic control

    1934 proceedings of fifth annual meeting of institute of traffic engineers

    Engineering Index Backfile | 1934
    Schlagwörter: Highway traffic control

    1938 Proceedings of Institute of Traffic Engineers

    Engineering Index Backfile | 1938
    Schlagwörter: Highway traffic control

    1940 proceedings -- Eleventh annual meeting

    Engineering Index Backfile | 1940
    Schlagwörter: Highway traffic control

    1941 proceedings -- Twelfth annual meeting

    Engineering Index Backfile | 1941
    Schlagwörter: Highway traffic control