TY  - BOOK
AU  - Tivy, Joy
AU  - O'Hare, Greg
TI  - Human impact on the ecosystem
SN  - 50032038
U1  - 574.5 
PY  - 1981///
CY  - New York
PB  - Oliver & Boyd
KW  - Man - Influence on nature
N1  - Includes bibliographical references, glossary & index
ER  -