Lilly, W. E. (1911). A new formula for the design of arches.
Lua i Stíl Chicago (17ú heag.)Lilly, W. E. A New Formula for the Design of Arches. 1911.
Lua MLA (9ú heag.)Lilly, W. E. A New Formula for the Design of Arches. 1911.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
