TY  - BOOK
AU  - Arul, P
TI  - Textbook of environmental studies
CY  - Chennai
KW  - Biodiversity
KW  - Ecosystems
KW  - Environmental engineering
KW  - Environmental science
KW  - Natural resources
KW  - Pollution -- Environmental pollution
KW  - Social issues  Environmental
N1  - Includes glossary and question pattern
ER  -