TY  - BOOK
AU  -  Rajvaidya, Neelima. 
AU  -  Markandey, Dilip Kumar .
TI  - Environmental measurement : : concept & approach 
SN  - 8176487910 ;9788176487917
PY  - 2005///
CY  - New Delhi
PB  -  APH Publishing Corporation, 
KW  - Sewage -- Purification -- Biological treatment.;Environmental impact analysis
ER  -