TY  - BOOK
AU  - Steffen,William L
TI  - Global change and the earth system: a planet under pressure 
SN  - 3540408002
PY  - 2004///
CY  - Berlin
PB  - Springer
KW  - Global environmental change
KW  - Nature
KW  - Effect of human beings on
N1  - Includes bibliographical references and index; Open access
ER  -