TY  - BOOK
AU  - Tiwari, S.K
TI  - Environmental Science
SN  - 978-81-269-1475-3
AV  - GE 105 .T59 2011 15118
PY  - 2011///
CY  - New Delhi
PB  - Atlantic
KW  - environment studies, environment
N1  - includes bibliographical references
ER  -