Essentials of Physical Geography
Eighth Edition
Robert E. Gabler
Emeritus,Western Illinois University
James F. Petersen
Texas State University—San Marcos
L. Michael Trapasso
Western Kentucky University
With contributions by
Dorothy Sack
Ohio University,Athens
Robert J. Sager
Pierce College,Washington
Daniel L. Wise
Western Illinois University
Australia • Brazil • Canada • Mexico • Singapore • Spain United Kingdom • United States
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