Bibliography+for+quaternary

__Bibliography__ Amazon.com: Science Explorer: Earth Science (9780130506221): Prentice Hall: Books." //Amazon.com: Online Shopping for Electronics, Apparel, Computers, Books, DVDs & More//. Web. 05

Dec. 2011. . Arnold, Caroline, and Laurie A. Caple. //When Mammoths Walked the Earth//. New York: Clarion, 2002. Print.

Beals, Kevin. //Life through Time: Evolutionary Activities for// //Grades 5-8//. Berkeley: Great Explorations in Math and Science,

Lawrence Hall of Science, University of California at Berkeley, 2003. "General Logon Page." //Gale Error Page//. Web. 05 Dec. 2011. .

//General Logon Page//. Web. 05 Dec. 2011. .