TY  - BOOK
AU  - Porter, John
TI  - Physical environment & human activities
SN  - 0199133328
U1  - 577 
PY  - 1993///
CY  - Oxford, England
PB  - Allen Lane
KW  - Human ecology
KW  - Nature
KW  - Effect of human beings on
N1  - 002518; S 106
ER  -