(1966). Highway Capacity Manual 1965. Highway Research Board.
Lua i Stíl Chicago (17ú heag.)Highway Capacity Manual 1965. Highway Research Board, 1966.
Lua MLA (8ú heag.)Highway Capacity Manual 1965. Highway Research Board, 1966.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.