• 17 Videos, Slides, Films

• 2 DVDs

• 7 History
• 7 Plate tectonics
• 5 Continental drift
• 4 Volcanoes
• 3 Geology
• 3 Trenches
• 2 Asteroids
• 2 Glacial epoch
• 2 Gold
• 2 Tsunamis
• 2 Volcanic eruptions
• 2 Volcanism
• 2 Volcanology
• 1 Catastrophes (Geology)
• 1 Collisions with Earth
• 1 Deserts
• 1 Earth temperature
• 1 Effect of environment on
• 1 Effect of volcanic eruptions on
• 1 Eruptions
• 1 Formations (Geology)
• 1 Origin
• 1 Volcanic gases

• 17 Johnson, Corey, 1961-
• 7 Hicklin, William
• 3 Werbe, Susan
• 2 Arts and Entertainment Network
• 2 Dart, Kate
• 2 History (Television network)
• 2 Johnson, Kathryn (Director)
• 2 New Video Group
• 2 Pioneer Productions
• 2 Scarrott, Rachel
• 1 Astbury, Louise
• 1 Beckham, Mike
• 1 Carter, Stuart (Producer)
• 1 Kirk, Belinda
• 1 Polletta, Gabriella
• 1 Strange, Robert

• 17 English

• 9 Earth (Planet)
• 4 Pacific Area
• 2 Alps
• 2 Atacama Desert (Chile)
• 2 Everest, Mount (China and Nepal)
• 2 Iceland
• 2 Krakatoa (Indonesia)
• 2 North America
• 2 Rocky Mountains
• 2 Sahara
• 2 San Andreas Fault (Calif.)
• 2 Vesuvius (Italy)
• 1 Africa, North
• 1 Chile
• 1 Death Valley (Calif. and Nev.)
• 1 Europe
• 1 Grand Canyon (Ariz.)
• 1 Great Lakes (North America)
• 1 Hawaii
• 1 Italy
• 1 Ness, Loch (Scotland)
• 1 New York
• 1 New York (N.Y.)
• 1 New York (State)
• 1 Rocky Mountains Region

• 17 Documentary television programs
• 2 Nature television programs
• 2 Nonfiction television programs
• 2 Science television programs
• 2 Television programs
• 2 Television series
• 2 Video recordings for the hearing impaired

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