TY  - BOOK
AU  - Christopherson, Robert W.
TI  - Geosystems : : an introduction to physical geography
SN  - 0023224436
AV  - GB 54.5 .C48 1992 
PY  - 1992///
CY  - New York
PB  - Macmillan
KW  - Physical geography
ER  -