Não informado. (1925). Information Circular. U.S. Department of the Interior, Bureau of Mines.
Lua i Stíl Chicago (17ú heag.)Não informado. Information Circular. Washington: U.S. Department of the Interior, Bureau of Mines, 1925.
Lua MLA (8ú heag.)Não informado. Information Circular. U.S. Department of the Interior, Bureau of Mines, 1925.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.