Ketchum, M. S. Structural engineers handbook: Data for the design and construction of steel bridges and buildigs.
Lua i Stíl Chicago (17ú heag.)Ketchum, Milo S. Structural Engineers Handbook: Data for the Design and Construction of Steel Bridges and Buildigs.
Lua MLA (8ú heag.)Ketchum, Milo S. Structural Engineers Handbook: Data for the Design and Construction of Steel Bridges and Buildigs.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.