Não informado. (1957). Scientific world. World Federation of Scientific Workers.
Lua i Stíl Chicago (17ú heag.)Não informado. Scientific World. London: World Federation of Scientific Workers, 1957.
Lua MLA (8ú heag.)Não informado. Scientific World. World Federation of Scientific Workers, 1957.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.