1. Mission to Planet Earth;Airu;Sensors,1992)
2. Roving Stones;Appenzeller;Sci. Amer.,1990
3. Water in the Earth's Mantle: The Role of Nominally Anhydrous Minerals;Bell;Science,1992)
4. Botkin , D. E. Keller Environmental Science: Earth as a Living Planet (3rd Edition) John Wiley & Sons New York, NY 1999
5. Bowler , P.J. The Earth Encompassed: A History of the Environmental Sciences W.W. Norton Company New York, NY 2000