References

Doolittle, W. F., 2000. Uprooting the tree of life, Scientific American, Vol. 282, No. 2. Lovelock, James, 1987. Gaia: A New Look at Life on Earth, Oxford University Press, New York. Odum, Eugene, 1993. Ecology and Our Endangered Life Support Systems, Sinauer Associates, Sunderland, MA.

Postlethwait, J. H., and J. L. Hopson, 1995. The Nature of Life, McGraw-Hill, New York. Schrodinger, Erwin, 1956. What Is Life?, Doubleday Anchor Books, Garden City, NY. Wallace, R. A., J. L. King, and G. P. Sanders, 1986. Biology: The Science of Life, Scott, Foresman, Glenview, IL.

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