TY  - BOOK
AU  - Christopherson,Robert W.
TI  - Geosystems: an introduction to physical geography 
SN  - 0130163452 :
AV  - GB54.5 .C47 2002
PY  - 2002///
CY  - Upper Saddle River, NJ
PB  - Prentice Hall
KW  - Physical geography
ER  -