National Research Council (U.S.). Committee on Surface Drainage of Highways. (1953). Culvert hydraulics: Presented at the thirty-second annual meeting, January 13-16, 1953. Highway Research Board.
Lua i Stíl Chicago (17ú heag.)National Research Council (U.S.). Committee on Surface Drainage of Highways. Culvert Hydraulics: Presented at the Thirty-second Annual Meeting, January 13-16, 1953. Washington, D.C: Highway Research Board, 1953.
Lua MLA (9ú heag.)National Research Council (U.S.). Committee on Surface Drainage of Highways. Culvert Hydraulics: Presented at the Thirty-second Annual Meeting, January 13-16, 1953. Highway Research Board, 1953.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.