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Lua i Stíl Chicago (17ú heag.)National Cooperative Highway Research Program, Del Huntington, agus Jerilyn C. Wen. Access Rights: A Synthesis of Highway Practice. Washington, D.C: Transportation Research Board, National Research Council, 2005.
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Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.