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Alvarez, Walter, Alvarez, Luis Michel, Helen, and Asaro, Frank, Science, June 6, 1980.

Alvarez, Walter and Asaro, Frank, and Courtillot, Vincent E., “What Caused the Mass Extinction?” Scientific American, Vol. 263, No. 4, page 76- 92, October, 1990. 

Andrew Fraknoi's Resource Guides for Astronomy and Astronomy Education -

Dobb, Edwin, “Hot Times in the Cretaceous,” Discover, February, pages 11-13, 1992.

Gribbin, John, Blinded by the Light: The Secret Life of the Sun, New York: Harmony Books,

Milne, Lorus J., and Milne, Margery, Understanding Radioactivity, New York: Atheneum, 1989.

Monastersky, Richard, “Closing in on the Killer,” Science News, Vol. 141, No. 4, pages 56-58, January 25, 1992.

Morrison, David, Wolff, Sidney, and Fraknoi, Andrew, Abell's Exploration of the Universe, Seventh Edition, Philadelphia: Harcourt Brace Jovanovich College Publishers, 1995.

Smithsonian Exposition Books, The Fire of Life, New York: W.W. Norton & Company, 1981.

Wentzel, Donat G., “The Solar Chimes: Searching for Oscillations Inside the Sun,” Mercury, May/ June, 1991, pages 77-84.