TY  - BOOK
ED  - American Society of Civil Engineers.
TI  - Filtering materials for sewage treatment plants,
T2  - Am. Soc. C. E. Manuals of engineering practice
U1  - 628.352 
PY  - 1937///
CY  - New York, N.Y.
PB  - Headquarters of the Society
KW  - Sewage
KW  - Purification
KW  - Filters and filtration
N1  - Cover-title
ER  -