TY  - BOOK
AU  - Grady, C. P. Leslie
TI  - Biological wastewater treatment
SN  - 9780849396793
U1  - 628.35 GRA-C 
PY  - 2011///
CY  - Boca Raton
PB  - CRC Press
KW  - Sewage --Purification --Biological treatment
ER  -