Não informado. (1965). Engineering Geology. Elsevier Scientific Publishing.
Lua i Stíl Chicago (17ú heag.)Não informado. Engineering Geology. Amsterdam: Elsevier Scientific Publishing, 1965.
Lua MLA (8ú heag.)Não informado. Engineering Geology. Elsevier Scientific Publishing, 1965.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.