Proceedings of the institution of civil engineers September 1957.
Lua i Stíl Chicago (17ú heag.)Proceedings of the Institution of Civil Engineers September 1957.
Lua MLA (9ú heag.)Proceedings of the Institution of Civil Engineers September 1957.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.