CHOPRA, U. (1993). Dictionary Of Civil Engineering U.b. Chopra B.e.m. Tech. Crescent News.
Lua i Stíl Chicago (17ú heag.)CHOPRA, U.B. Dictionary Of Civil Engineering U.b. Chopra B.e.m. Tech. Crescent News, 1993.
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Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.