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- 72085156 created "[1972]".
- 72085156 date "1972".
- 72085156 date "[1972]".
- 72085156 dateCopyrighted "[1972]".
- 72085156 description "Includes bibliographical references.".
- 72085156 extent "v, 48 p.".
- 72085156 identifier "0309020530".
- 72085156 isPartOf "HRB special report 129".
- 72085156 isPartOf "Special report (National Research Council (U.S.). Highway Research Board) ; 129.".
- 72085156 issued "1972".
- 72085156 issued "[1972]".
- 72085156 language "eng".
- 72085156 publisher "[Washington] Highway Research Board, National Research Council".
- 72085156 subject "388.3/12".
- 72085156 subject "Electronic traffic controls.".
- 72085156 subject "HE370 .C47".
- 72085156 subject "Traffic signs and signals.".
- 72085156 subject "Variable message signs.".
- 72085156 title "The Changeable-message concept of traffic control; report of a conference held July 15-16, 1971.".
- 72085156 type "text".