Não informado. (1976). Minerals & Materials. U.S. Department of the Interior, Bureau of Mines.
Lua i Stíl Chicago (17ú heag.)Não informado. Minerals & Materials. Washington: U.S. Department of the Interior, Bureau of Mines, 1976.
Lua MLA (8ú heag.)Não informado. Minerals & Materials. U.S. Department of the Interior, Bureau of Mines, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.