Behind the Numbers

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Smith, Robert L. (1980). Ecology and Field Biology. New York: Harper and Row.

Gribbin, J. & Gribbin, M. (1996). Fire on Earth. New York, N.Y.: St. Martin's Press

Exploring Our Living Planet. (1983). National Geographic Society, Washington, DC.

ENN The Environmental News Network

NASA's Bigelow Laboratory: Web or Chain?

NASA's Bigelow Laboratory: Shipmates Educational

AAAS: Population and ecosystems

The Franklin Institute: Neighborhoods: Ecosystems, Biomes, and Habitats