TY  - BOOK
AU  - Christopherson,Robert W
AU  - Birkeland,  Ginger H 
TI  - Geosystems:  an introduction to physical geography
SN  - 978-1-292-05775-0
AV  - GB54.5.C48 
PY  - 2015///
CY  - London.
PB  -  : Pearson Education Limited.
KW  - Physical geography
N1  - Include index
ER  -