• Aeromagnetic total field, Schreiber, Ontario-U.S.A.
• Aeromagnetic total field, Alpena, Ontario-U.S.A.
• Aeromagnetic total field, Hancock, Ontario-U.S.A.
• Aeromagnetic total field, Cleveland, Ontario-U.S.A.
• Aeromagnetic total field, Flint, Ontario-U.S.A.