TY  - BOOK
AU  - Trivedi,,P.R
TI  - Encyclopedia of Environment, pollution, planning and conservation( A SET OF 6 VOLUMES)
SN  - 8176480045
AV  - Ref. TD173.T7 2000 
PY  - 2000///
CY  - New delhi
PB  - A.P.H
KW  - Environmental pollution -encyclopedia
ER  -