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- 81052992 contributor B3975909.
- 81052992 contributor B3975910.
- 81052992 created "[1981]".
- 81052992 date "1981".
- 81052992 date "[1981]".
- 81052992 dateCopyrighted "[1981]".
- 81052992 description "Includes bibliographical references.".
- 81052992 extent "49 p. :".
- 81052992 identifier "0309031621 (pbk.) :".
- 81052992 isPartOf "Report (National Cooperative Highway Research Program) ; 235.".
- 81052992 isPartOf "Report / National Cooperative Highway Research Program, 0077-5614 ; 235".
- 81052992 issued "1981".
- 81052992 issued "[1981]".
- 81052992 language "eng".
- 81052992 publisher "Washington, D.C. : Transportation Research Board, National Research Council,".
- 81052992 subject "625.7 s 388.3/122 19".
- 81052992 subject "TE7 .N25 no. 235 TE228".
- 81052992 subject "Traffic safety.".
- 81052992 subject "Traffic signs and signals.".
- 81052992 subject "Variable message signs.".
- 81052992 title "Effectiveness of changeable message displays in advance of high-speed freeway lane closures / Fred R. Hanscom.".
- 81052992 type "text".