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Author/Creator
- Geological Survey of Canada[remove]4
- Baird, David McCurdy 1920-1
- Bankey, Viki1
- Canada1
- Canada. Environment Canada1
- Canada. Natural Resources Canada1
- Canada. Office of Critical Infrastructure Protection and Emergency Preparedness1
- Consejo de Recursos Minerales (Mexico)1
- Geological Survey (U.S.)1
- Kramers, R. Eric1
- North American Magnetic Anomaly Group1
- Pelletier, B. R. (Bernard Roderick), 1923-1
- Petróleos Mexicanos1
- Safe Guard (Organization)1
- Statistics Canada1
- United States. National Oceanic and Atmospheric Administration1