TY  - BOOK
AU  - Zafar, A. R.
TI  - Biological indicators and indices of environmental pollution: proceedings of the workshop held at Osmania University, Hyderabad, India during 21-23 September, 1981 under a who grant
U1  - O91x54 C333b 
PY  - 1982///
CY  - New Delhi
PB  - Central Board for the prevention and control of water pollution
BR  - 59978
ER  -