Não informado. Association of Engineering Geologists newsletter. Association of Engineering Geologists.
Chicago-viite (17. p.)Não informado. Association of Engineering Geologists Newsletter. Lawrence, Kan: Association of Engineering Geologists.
MLA-viite (8. p.)Não informado. Association of Engineering Geologists Newsletter. Association of Engineering Geologists.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.