TY  - BOOK
AU  - Tivy,Joy
AU  - O'Hare,Greg
TI  - Human impact on the ecosystem
SN  - 0050034243
PY  - 1981///
CY  - Edinburgh
PB  - Oliver & Boyd
KW  - Man
KW  - influence on nature
N1  - Includes bibliographical references (p. 227-235) and index
ER  -