• 1 Steenbock Library

• 1 DVDs

• 18 Natural history
• 16 Physical geography
• 9 Animals
• 8 Ecology
• 5 Earth sciences
• 4 Climatic changes
• 4 Effect of human beings on
• 4 Human ecology
• 4 Landscapes
• 4 Life
• 4 Nature
• 3 Artificial satellites
• 3 Orbit
• 3 Orbits
• 2 Color
• 2 Deserts
• 2 Forests and forestry
• 2 Geology
• 2 Global warming
• 2 Marine animals
• 2 Marine ecology
• 2 Ocean
• 1 Aquatic ecology
• 1 Atmosphere
• 1 Bioclimatology

• 15 Discovery Channel (Firm)
• 11 Attenborough, David, 1926-
• 11 BBC Worldwide Americas, Inc.
• 11 Fothergill, Alastair
• 11 Nihon Hōsō Kyōkai
• 5 BBC Worldwide Ltd.
• 5 Lawrie, Ben
• 5 National Geographic Channel (Television station : Washington, D.C.)
• 5 Renouf, Jonathan
• 5 Stewart, Iain S.
• 4 BBC Studios
• 4 British Broadcasting Corporation. Natural History Unit
• 4 Johnson, Corey, 1961-
• 4 Open University
• 4 Public Broadcasting Service (U.S.)
• 4 Tencent Penguin Pictures
• 3 Cordey, Huw
• 2 Berlowitz, Vanessa
• 2 Brownlow, Mark
• 2 Linfield, Mark
• 2 Nurmohamed, Arif
• 2 Revill, Barny
• 1 Alexander Street Press
• 1 Allen, Penny, Dr

• 30 English

• 1 Everest, Mount (China and Nepal)
• 1 Great Rift Valley
• 1 Himalaya Mountains
• 1 Polar regions
• 1 Solar system

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