Christopherson, Robert W. . Applied physical geography Geosystems in the laboratory / by Robert W. Christopherson and Gail Lewis Hobbs. - 3rd ed. / - New Jersey : Prentice Hall, inc. , 2000 - ix, 294p : ISBN: 0-13-011324-7 Subjects--Topical Terms: Physical geography- Geosystems Dewey Class. No.: U2 / P0