TY  - BOOK
AU  - Hegemann,W.
AU  -  Bischofsberger,W..
AU  - Englmann,E..
TI  - Upgrading of wastewater treatment plants : procedings of the International Association on Water Pollution Research and Control(IANPRC) / 
SN  - 0080407773
U1  - 628.1620286 
PY  - 1990///
CY  - Oxford : 
PB  - Pergamon Press , 
KW  - WATER TREATMENT PLANTS
ER  -