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- 68061722 contributor B1871231.
- 68061722 contributor B1871232.
- 68061722 contributor B1871233.
- 68061722 created "1968.".
- 68061722 date "1968".
- 68061722 date "1968.".
- 68061722 dateCopyrighted "1968.".
- 68061722 description "Copy 1 with: Factors influencing safety at highway-rail grade crossings / David W. Schoppert and Dan W. Hoyt. Washington : Highway Research Board, Division of Engineering, National Research Council, 1968. Bound together subsequent to publication. DLC".
- 68061722 description "Copy 2 with: Research needs in highway transportation / Bertram D. Tallamy Associates, and Wilbur Smith and Associates. Washington : Highway Research Board, Division of Engineering, National Research Council, 1968. Bound together subsequent to publication. DLC".
- 68061722 extent "63 p.".
- 68061722 isPartOf "NAS-NRC publication 1588".
- 68061722 isPartOf "National Cooperative Highway Research Program. Report ; 54".
- 68061722 isPartOf "Publication (National Research Council (U.S.)) ; no. 1588.".
- 68061722 isPartOf "Report (National Cooperative Highway Research Program) ; 54.".
- 68061722 issued "1968".
- 68061722 issued "1968.".
- 68061722 language "eng".
- 68061722 publisher "[Washington] Highway Research Board, National Research Council,".
- 68061722 subject "625.7/9".
- 68061722 subject "Roads Guard fences.".
- 68061722 subject "TE7 .N25 no. 54".
- 68061722 title "Location, selection, and maintenance of highway guardrails and median barriers [by] J. D. Michie and L. R. Calcote.".
- 68061722 type "text".