Não informado. (1956). Journal of the Southern African Institute of Mining and Metallurgy. South African Institute of Mining and Metallurgy.
Lua i Stíl Chicago (17ú heag.)Não informado. Journal of the Southern African Institute of Mining and Metallurgy. Johannesburg, Africa do Sul: South African Institute of Mining and Metallurgy, 1956.
Lua MLA (8ú heag.)Não informado. Journal of the Southern African Institute of Mining and Metallurgy. South African Institute of Mining and Metallurgy, 1956.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.