TY  - BOOK
AU  - Brown,James C.
TI  - Methods for improvement of trickling filter plant performance
U1  - 363.7 
PY  - 1973///
CY  - Washington, D.C.
PB  - United States Government Printing Office
KW  - Environmental protection
N1  - EPA-670/2-73-047a; Library has pt. 1; Part 1. Mechanical and biological optima
ER  -