Não informado. (1930). Lead. Lead Industries Association.
Lua i Stíl Chicago (17ú heag.)Não informado. Lead. New York: Lead Industries Association, 1930.
Lua MLA (8ú heag.)Não informado. Lead. Lead Industries Association, 1930.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.