BOOKS
The Editors of Klutz. "Disaster Science" Singapore: Klutz, 1998, p. 15, p. 21, p. 35.
Loesching, Louis V. "Simple Earth Science Experiments with Everyday Materials" New York: Sterling Publishing Company, Inc., 1996, pp. 10-11, pp. 108-109.
Hauser, Jill Frankel. "Super Science Concoctions: 50 Mysterious Mixtures for Fabulous Fun" Charlotte, VT: Williamson Publishing, 1997, pp. 52-53.
Buller, Laura & Taylor, Ron. "More Science In Action: Forces of Nature" New York: Marshall Cavendish Corporation, 1990, p. 22, pp. 14-15.