• 4 Videos, Slides, Films

• 2 Volcanoes
• 1 Constitutional history
• 1 Constitutional law
• 1 Frozen foods
• 1 Frozen foods industry
• 1 Geography
• 1 Historical geology
• 1 History
• 1 Horsemeat
• 1 Internal structure
• 1 Physical geography
• 1 Plate tectonics

• 4 Films Media Group
• 2 Infobase
• 1 Public Broadcasting Service (U.S.)
• 1 Pumpkin TV (Firm)

• 1 Earth (Planet)
• 1 United States

• 4 Educational films
• 4 Internet videos
• 4 Videorecording

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