TY  - BOOK
AU  - Logsdon,Gary S.
ED  - American Society of Civil Engineers.
TI  - Slow sand filtration: a report 
SN  - 0872628477
PY  - 1991///
CY  - New York, N.Y.
PB  - The Society
KW  - Water
KW  - Purification
KW  - Filtration
ER  -