• 20 Videos, Slides, Films

• 1 DVDs

• 19 Cosmology
• 17 Astronomy
• 11 Evolution
• 5 Biology
• 5 Ecology
• 4 Human ecology
• 2 Galaxies
• 1 Agricultural ecology
• 1 Cities and towns
• 1 Community-supported agriculture
• 1 Continental drift
• 1 Economic aspects
• 1 Environmental education
• 1 Environmental justice
• 1 Environmental protection
• 1 Geology
• 1 Historical geology
• 1 History
• 1 Human beings
• 1 Mythology
• 1 Navajo cosmology
• 1 Paleontology
• 1 Permaculture
• 1 Plate tectonics
• 1 Renewable energy sources

• 19 Independent Communications Associates
• 19 Kennard, David
• 19 Music Video Distributors, Inc.
• 19 Northcutt Productions
• 19 Northcutt, Patsy
• 19 Swimme, Brian
• 19 Tucker, Mary Evelyn
• 19 Yale University. School of Forestry and Environmental Studies
• 1 Carter, Stuart
• 1 Chin, Peter
• 1 Herrmann, Edward, 1943-2014
• 1 History Channel (Television network)
• 1 New Video Group
• 1 Pioneer Productions
• 1 Werbe, Susan

• 20 English

• 19 Universe
• 1 Solar system

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