TY  - BOOK
AU  - Turner, B. L.
TI  - The Earth as transformed by human action: global and regional ch anges in the biosphere over the past 300 years 
SN  - 0521363578
PY  - 1990///
CY  - Cambridge
PB  - Cambridge University Press with Clark University
KW  - Nature
KW  - Effect of human beings on
KW  - Congresses
KW  - Human ecology
KW  - Global environmental change
KW  - Population
N1  - Based on papers presented at a symposium held at Clark University, W orcester, Mass., Oct. 25-30, 1987; Includes bibliographical references and index
ER  -