• 2 Map Library (Robinson)

• 1 Environmental conditions
• 1 Geomagnetism
• 1 Magnetic declination
• 1 Pollution

• 1 British Geological Survey
• 1 Garver, John B., Jr
• 1 National Geographic Society (U.S.). Cartographic Division
• 1 United States. Defense Mapping Agency. Hydrographic/Topographic Center
• 1 United States. Naval Oceanographic Office

• 2 English

• 1 Earth (Planet)

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