Não informado. (1956). Geographical Paper. Department of Mines and Technical Surveys, Geographical Branch.
Chicago-referens (17:e uppl.)Não informado. Geographical Paper. Ottawa: Department of Mines and Technical Surveys, Geographical Branch, 1956.
MLA-referens (8:e uppl.)Não informado. Geographical Paper. Department of Mines and Technical Surveys, Geographical Branch, 1956.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.