• 12 Videos, Slides, Films

• 2 DVDs

• 10 Plate tectonics
• 9 History
• 5 Internal structure
• 5 Physical geography
• 4 Geology
• 2 Continental drift
• 2 Eruptions
• 2 Geography
• 2 Volcanic eruptions
• 1 Asteroids
• 1 Collisions with Earth
• 1 Earthquakes
• 1 Glacial epoch
• 1 Gold
• 1 Origin
• 1 Pacific Area
• 1 Rifts (Geology)
• 1 Trenches
• 1 Tsunamis
• 1 Volcanism
• 1 Volcanology

• 6 Films Media Group
• 6 Films for the Humanities & Sciences (Firm)
• 4 Johnson, Corey, 1961-
• 3 Hicklin, William
• 2 90th Parallel Film & Television Productions
• 2 Arts and Entertainment Network
• 2 Bullfrog Films
• 2 Canadian Broadcasting Corporation
• 2 History (Television network)
• 2 Infobase
• 2 National Geographic Channel (Television station : Washington, D.C.)
• 2 New Video Group
• 2 Pioneer Productions
• 2 Suzuki, David, 1936-
• 1 Allder, Michael
• 1 CBC Learning (Firm)
• 1 Discovery Science
• 1 Europe Images International
• 1 Gregg, Andrew
• 1 Kirk, Belinda
• 1 Scarrott, Rachel
• 1 Werbe, Susan

• 12 English

• 8 Earth (Planet)
• 3 Iceland
• 3 Pacific Area
• 3 Vesuvius (Italy)
• 2 Hawaii
• 2 Italy
• 2 Krakatoa (Indonesia)
• 2 Yellowstone National Park
• 1 Alps
• 1 Atacama Desert (Chile)
• 1 Death Valley (Calif. and Nev.)
• 1 East Asia
• 1 Everest, Mount (China and Nepal)
• 1 Grand Canyon (Ariz.)
• 1 Great Lakes (North America)
• 1 Indonesia
• 1 Krakatoa
• 1 Ness, Loch (Scotland)
• 1 New York (N.Y.)
• 1 North America
• 1 Oceania
• 1 Rocky Mountains
• 1 Sahara
• 1 Saint Helens, Mount (Wash.)
• 1 San Andreas Fault (Calif.)

• 7 Video recordings for the hearing impaired
• 6 Educational films
• 6 Internet videos
• 6 Videorecording
• 5 Documentary television programs
• 3 Nonfiction television programs
• 2 Nature television programs
• 2 Science television programs
• 2 Television programs
• 2 Television series

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