TY  - BOOK
AU  - Trivedi, P. R. 
AU  - Raj, Gurdeep 
TI  - Concepts in environment
SN  - 8171582303
U1  - 333.7 23
PY  - 1992/// [reprinted 1997]
CY  - New Delhi : 
PB  - Akashdeep Pub. House
KW  - Environmental sciences
ER  -