Não informado. (1939). Geological survey paper: Mines and geology branch. Department of Mines and Technical Surveys, Geological Survey.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Geological Survey Paper: Mines and Geology Branch. Ottawa: Department of Mines and Technical Surveys, Geological Survey, 1939.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Geological Survey Paper: Mines and Geology Branch. Department of Mines and Technical Surveys, Geological Survey, 1939.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.