TY  - BOOK
AU  - Tivy, Joy.
AU  - O'Hare, Greg.
TI  -  Human impact on the ecosystem
SN  - 0050034243 :
U1  - CNS 304.2 TIV 
PY  - 1982///
CY  - Edinburgh,  New York
PB  - Oliver & Boyd
KW  - Nature
KW  - Effect of human beings on
KW  - Human ecology
N1  - Includes bibliographical references and index
ER  -