TY  - BOOK
AU  - Skinner,Brian J.
AU  - Porter,Stephen C.
AU  - Botkin,Daniel B.
TI  - The blue planet: an introduction to earth system science 
SN  - 0471161144
PY  - 1999///
CY  - New York
PB  - John Wiley & Sons, Inc.
KW  - Earth
KW  - Earth sciences
ER  -