TY  - BOOK
AU  - Gray,N.F.
TI  - Biology of wastewater treatment
SN  - 1860943284
PY  - 2004///
CY  - London
PB  - Imperial College Press
KW  - Sewage
KW  - Purification
KW  - Biological treatment
KW  - Sewage disposal
KW  - Biotechnology
ER  -