TY  - BOOK
AU  - NARAYANA, RAO M
TI  - WASTE WATER TREATMENT : ROTATIONAL METHODS OF DESIGN & INDUSTRIAL PRACTICES 
U1  - 628.3 N87 NAR/DAT 
PY  - 1987///
CY  - NEW DELHI
PB  - OXFORD & IBH PUBLICATION CO.
ER  -