Não informado. (1970). Bulletin of the International Association of Engineering Geology. Laboratoire Central des Ponts et Chaussées.
Lua i Stíl Chicago (17ú heag.)Não informado. Bulletin of the International Association of Engineering Geology. Paris: Laboratoire Central des Ponts et Chaussées, 1970.
Lua MLA (8ú heag.)Não informado. Bulletin of the International Association of Engineering Geology. Laboratoire Central des Ponts et Chaussées, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.