Front cover image for The encyclopedia of earth

The encyclopedia of earth

" ... a new electronic reference about the Earth, its natural environments, and their interaction with society. The Encyclopedia is a free, fully searchable collection of articles written by scholars, professionals, educators, and experts who collaborate and review each other's work."--About page (viewed May 13, 2011)

Website, English, uuuu
NCSE, Washington, D.C., uuuu