TY  - BOOK
AU  - Grady, C P Lesle; Daigger, Glen T; Lim, Henry C
TI  - Biological watewater treatment
U1  - R  628.162  GRA-B 
PY  - 1999///
CY  - Marcel Dekker Inc, New York
KW  - Water treatment-- Purification
ER  -