• 14 Videos, Slides, Films

• 14 Earth sciences
• 13 Geography
• 13 Landforms
• 13 Physical geography
• 13 Water use
• 9 Environmental sciences
• 8 Biotic communities
• 8 Ecological regions
• 8 Ecological zones
• 4 Crust
• 4 Earth (Planet)
• 4 Geology, Structural
• 4 Lithosphere
• 4 Mantle
• 1 Earth currents
• 1 Geodynamics
• 1 Power resources

• 14 Films Media Group
• 14 Infobase
• 10 Camille S. DeBose (Firm)
• 3 PBS (Firm)
• 1 Canadian Broadcasting Corp. (Firm)

• 14 English

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