Christopherson, Robert W.. Elemental geosystems / by Robert W. Christopherson. - 2nd ed / . - New Jersey : Prentice Hall , 1998. - xvii,551p. : ills.,figs.(col.),maps(col.) ; 25cm 1 CD . Include glossary and index ISBN: 9780137435357 USD 59.00 Subjects--Index Terms: PHYSICAL GEOGRAPHY Dewey Class. No.: 910.02 / CHR/E