Physical geology / Plummer, Charles C., McGeary, David. Carlson, Diane H. Physical geology. 550 MCG 2003 A031 Or. Includes index. Boston : McGraw-Hill, c2003. c2003. Text xviii, 574 p. : http://www.loc.gov/catdir/description/mh021/2001044741.html http://www.loc.gov/catdir/toc/mh021/2001044741.html