Não informado. Publications of the Earth Physics Branch. Department of Energy, Mines and Resources.
Chicago-viite (17. p.)Não informado. Publications of the Earth Physics Branch. Ottawa: Department of Energy, Mines and Resources.
MLA-viite (8. p.)Não informado. Publications of the Earth Physics Branch. Department of Energy, Mines and Resources.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.