Não informado. (1962). Annals of the Geological Survey. Republic of South Africa, Department of Mines.
Lua i Stíl Chicago (17ú heag.)Não informado. Annals of the Geological Survey. Pretoria, Africa do Sul: Republic of South Africa, Department of Mines, 1962.
Lua MLA (8ú heag.)Não informado. Annals of the Geological Survey. Republic of South Africa, Department of Mines, 1962.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.