Physical geography / James F. Petersen, Dorothy Sack, Robert E. Gabler Petersen, James F. Sack, Dorothy jt. aut. Gabler, Robert E. jt. aut. Physical geography 550 PEP Includes index Glossary: p. 611-630 Belmont : Brooks/Cole Cengage Learning, 2012 2012 2012 Text xxiv, 646 p. : eng