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Lua i Stíl Chicago (17ú heag.)International Commission on Illumination. Lighting of Traffic Signs. Paris: Bureau central de la CIE, 1978.
Lua MLA (8ú heag.)International Commission on Illumination. Lighting of Traffic Signs. Bureau central de la CIE, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.