Não informado. (1946). Mining Survey. Transvaal and Orange Free State Chamber of Mines.
Lua i Stíl Chicago (17ú heag.)Não informado. Mining Survey. Johannesburg, Africa do Sul: Transvaal and Orange Free State Chamber of Mines, 1946.
Lua MLA (8ú heag.)Não informado. Mining Survey. Transvaal and Orange Free State Chamber of Mines, 1946.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.