Não informado. (1964). Coal, gold and base minerals of Southern Africa. Pithead Press.
Lua i Stíl Chicago (17ú heag.)Não informado. Coal, Gold and Base Minerals of Southern Africa. Johannesburg, Africa do Sul: Pithead Press, 1964.
Lua MLA (8ú heag.)Não informado. Coal, Gold and Base Minerals of Southern Africa. Pithead Press, 1964.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.