Christopherson, Robert W. Applied physical geography / Robert W. Christopherson, Gail Lewis Hobbs. - New Jersey : Prentice Hall , 1998. - viii,292p : ills,figs ; 29cm . NULL ISBN: 0135054052 Rs.1194/= Subjects--Index Terms: PHYSICAL GEOGRAPHY Dewey Class. No.: 910.02 / CHR/A