TY  - BOOK
AU  - Botkin, Daniel B.;
AU  - Keller, Edward A.,
TI  - Environmental science : : Earth as a living planet
SN  - 0471157821
AV  - GE105 .B68 1997 
PY  - 1997///
CY  - Canada
PB  - John Wiley & Son, Inc.
KW  - Human ecology
KW  - Environmental sciences
ER  -