TY  - BOOK
AU  - Botkin,Daniel B.
AU  - Keller,Edward A.
TI  - Environmental science: earth as a living planet 
SN  - 0471321737
AV  - GE105 .B68 2000
U1  - 363.7 
PY  - 2000///
CY  - New York
PB  - John Wiley
KW  - Environmental science
KW  - Human ecology
KW  - Environmental protection
ER  -