TY  - BOOK
AU  - Robert W. Christopherson
TI  - Geosystems: An introduction to physical geography
SN  - 0-13-010845-6
U1  -  910.02 
PY  - 1994///
CY  - Upper Saddle River,USA
PB  - Prentice Hall
KW  - Physical geography
ER  -