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Citations and References

1. VanCleave JP.   Chemistry For Every Kid.  John Wiley and sons, Inc. New York, 1989.
2.  Milne, L. and Milne, M. The Mountains.   Editors of Life: Time Inc. New York, 1962. 
3.  Sandra, Markle. Digging Deeper Investigations into Rocks, Shocks, and other Earthly Matters. Lothrop, Lee, and Shepard Books, New York, 1987. 
4. The American Century Dictionary.  Warner Books Paperback Edition © 1995 by Oxford University Press, Inc., New York. 

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