Não informado. (1922). Engineering and Mining Journal-Press. McGraw-Hill Publications.
Lua i Stíl Chicago (17ú heag.)Não informado. Engineering and Mining Journal-Press. New York: McGraw-Hill Publications, 1922.
Lua MLA (8ú heag.)Não informado. Engineering and Mining Journal-Press. McGraw-Hill Publications, 1922.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.