Davidson, Jon P. Exploring earth : an introduction to physical geology / Jon P. Davidson, Walter E. Reed, Paul M. Davis. - Upper Saddle River, NJ : Prentice Hall, c1997. - xviii, 477 p. : ill. (some col.), maps (some col.) ; 28 cm. Includes index. ISBN: 0134639367 LCCN: 96-032914 Subjects--Topical Terms: Physical geology. LC Class. No.: QE28.2 / .D375 1997 Dewey Class. No.: 551