Physical geography / James F. Petersen, Dorothy Sack, Robert E. Gabler. Petersen, James F. Sack, Dorothy. jt. aut. Gabler, Robert E. jt. aut. Physical geography. GB55 .P48 2017 910.02 PEP Includes index. Glossary: p. 613-632. Boston : Cengage, 2017. 2017. 2017 Text xxii, 645 p. : eng