TY  - BOOK
AU  - Dawan, Ashok
TI  - A text book of environmental studies
SN  - 9788189005245
U1  - 333.7 
PY  - 2008///
CY  - New Delhi
PB  - Lotus Press
KW  - Environmental studies
KW  - Study and teaching
N1  - includes bibliographical references and index
ER  -