TY  - BOOK
AU  - Christopherson, Robert W.
AU  - Birkeland, Ginger. H.
TI  - Geosystems An Introduction to Physical Geography 
SN  - 9781292057750
U1  - 910.02 
PY  - 2015///
CY  - Harlow : 
PB  - Pearson, 
KW  - Physical Geography
N1  - NY
UR  - https://eaklibrary.neduet.edu.pk:8443/catalog/bk/books/toc/978-1-292-05775-0.pdf
ER  -