Sixth National Conference on Clays and Clay Minerals. (1957). Clays and clay minerals. Pergamon Press.
Lua i Stíl Chicago (17ú heag.)Sixth National Conference on Clays and Clay Minerals. Clays and Clay Minerals. New York: Pergamon Press, 1957.
Lua MLA (9ú heag.)Sixth National Conference on Clays and Clay Minerals. Clays and Clay Minerals. Pergamon Press, 1957.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.