Não informado. (1964). International Journal of Rock Mechanics and Mining Sciences. Pergamon Press.
Lua i Stíl Chicago (17ú heag.)Não informado. International Journal of Rock Mechanics and Mining Sciences. Oxford, Inglaterra: Pergamon Press, 1964.
Lua MLA (8ú heag.)Não informado. International Journal of Rock Mechanics and Mining Sciences. Pergamon Press, 1964.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.