TY  - BOOK
AU  - Christopherson Robert W
TI  - Geosystems:  An introduction to physical geography   
SN  - 0130108456
U1  - U2:(D6,9(B), P0 
PY  - 2000///
CY  - New Jersey 
PB  - Prentice Hall        
KW  - Physical Geography
N1  - C D included
ER  -