Não informado. Publications of the Earth Physics Branch. Department of Energy, Mines and Resources.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Publications of the Earth Physics Branch. Ottawa: Department of Energy, Mines and Resources.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Publications of the Earth Physics Branch. Department of Energy, Mines and Resources.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.