TY  - BOOK
AU  - Christopherson,Robert W.
AU  - Birkeland,Ginger
TI  - Elemental geosystems
SN  - 9780132940412 (pbk.)
PY  - 2013///
CY  - Boston
PB  - Pearson
KW  - Physical geography
N1  - Includes index
ER  -