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http://www.sanjuancapistrano.net/swallows/
The Facts on File Dictionary of Ecology and the Environment
Astronomy Encyclopedia
Find out what the Vernal Equinox is all about.
Credo Reference Provides entries explaining frequently used terms in environmental science, covering such topics as extinction, hazardous waste, genetic engineering, coliform bacteria, wildlife management, and global warming.
Reference QH540.4 .F35 2004
Plant Communities of New Jersey : a Study in Landscape Diversity
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