TY  - BOOK
AU  - Botkin, Daniel B.^aKeller^bEdward.
TI  - Environmental studies: the earth as a Living Planet / 
U1  - G:55 
PY  - 1997///
CY  - Ohio 43216 : 
PB  - Charles E. Merrill Publishing Company , 
KW  - Life Science<Environment>
ER  -