TY  - BOOK
AU  - Raven Peter H and Berg Linda R
AU  - Raven Peter H and Berg Linda R
TI  - Environment
SN  - 0030315832
U1  - 363.7 
PY  - 2001///
CY  - Philadelphia
PB  - Harcourt college publishers
KW  - ecosystem and energy
KW  - population growth
KW  - renewable energy and conservation
ER  -