TY  - BOOK
AU  - Basu, S K 
AU  - De, A K 
TI  - Questions and answers in environmental science
SN  - 9788173715471
U1  - 363.7076 B299q 
PY  - 2005///
CY  - Hyderabad
PB  - Universities Press
KW  - Environmental sciences
ER  -