Christopherson, Robert W. Elemental geosystems a foundation in physical geography / [[Book] :] Robert W. Christopherson. - Englewood Cliffs, N.J. : Prentice Hall, 1995. - 1 v. (various pagings : col. ill. ; 26 cm. Includes bibliographical references and index. All age. ISBN: 0023224614 Subjects--Topical Terms: Physical geography. Dewey Class. No.: 910.2 National Library of Medicine Call No.: 910.2 / C E