Não informado. (1958). Mineral Industries Bulletin. Colorado School of Mines.
Lua i Stíl Chicago (17ú heag.)Não informado. Mineral Industries Bulletin. Golden, Colo: Colorado School of Mines, 1958.
Lua MLA (8ú heag.)Não informado. Mineral Industries Bulletin. Colorado School of Mines, 1958.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.