Conservation and Preservation
Encyclopedia of Environmental Studies - 333.703 A831e  2001

Dictionary of Natural Resource Management - 333.703 D926d

Natural Resources - 333.703 B2852

Conservation and the Law: A Dictionary - 333.72 D674c

Wilderness Preservation: A Reference Handbook - 333.782 R813w

The Wiley Encyclopedia of Energy and the Environment - 333.7903 W6762

Handbook of Water Use and Conservation - 333.9116 V637h  200

Encyclopedia of Biodiversity - 333.95 E565

Encyclopedia of Energy - 333.7903 E5632 2004

Environmentalism
Encyclopedia of Global Change - 363.7 E564

International Encyclopedia of Environmental Politics - 363.7 I612  2002

Environmental Justice - 363.7 N562

Conservation and Environmentalism - 363.7003 C7556

Encyclopedia of Global Environmental Change - 363.7003 E566  2002

Environmental Encyclopedia - 363.7003 E612  2003

Recycling in America - 363.7282 S923r