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Bligh, Roger P.
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Crashworthy work-zone traffic control devices / Bligh, Roger P.
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Bligh, Roger P.
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Design of roadside barrier systems placed on MSE retaining walls / Bligh, Roger P.
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Bligh, Roger P., author.
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Test and evaluation of Arizona slip-away base luminaire supports / Bligh, Roger P., author.
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Mak, King K.
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Bligh, Roger P.
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Mak, King K.
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Bligh, Roger P.
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Ross, Hayes E.
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Bligh, Roger P.
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National Research Council (U.S.). Transportation Research Board.
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portable concrete barrier / Roger P. Bligh ... [et al.] -- Test level 4 noise wall for attachment to
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National Research Council (U.S.). Transportation Research Board.
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L. Menges, and D. Lance Bullard, Jr. -- Wyoming road closure gate / King K. Mak, Roger P. Bligh, and
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