TY  - BOOK
AU  - Gregory,K.J.
AU  - Walling,D.E.
TI  - Human activity and environmental processes
SN  - 0471912131
PY  - 1987///
CY  - New York
PB  - John Wiley & Sons
KW  - Physical geography
KW  - Man
KW  - influence on nature
ER  -