TY  - GEN
AU  - Rao , P. Venugopala
TI  - Principles of environmental science and engineering
SN  - 9788120328938
U1  - 577.14 
PY  - 2006///
CY  - New Delhi
PB  - Prentice-Hall 
KW  - ECOSYSTEMS
KW  - ENVIORONMENTAL SCIENCE
KW  - BIOSPHERE
KW  - BIOLOGY
KW  - ECOLOGY
KW  - NATURAL RESOURCES
KW  - BIODIVESITY
KW  - POLUTION AND CONTROL
ER  -