Geoghegan, C. (1871). A new method of extending existing bridges and reducing steep gradients.
Lua i Stíl Chicago (17ú heag.)Geoghegan, Charles. A New Method of Extending Existing Bridges and Reducing Steep Gradients. 1871.
Lua MLA (9ú heag.)Geoghegan, Charles. A New Method of Extending Existing Bridges and Reducing Steep Gradients. 1871.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
