TY  - BOOK
AU  - Horan 
TI  - Biological wastewater treatment systems : theory and operation 
T2  - [no series statement]
SN  - 0471924253
U1  - 628.35 HOR 1990 
PY  - 1990///
CY  - Chichester
PB  - John Wiley & Sons
KW  - Sewage
KW  - Purification
KW  - Biological treatment
N1  - Includes bibliographical references and index
ER  -