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2
Process design manual for upgrading existing wastewater treatment plants.
Washington, D.C. : U.S. Environmental Protection Agency, 1974

Book
3
Process design manual for phosphorus removal /
[S.l.] : [s.n.], 1976
[Rev. ed.]

Government Document Book
4
Process design manual for nitrogen control /
[Washington, D.C.] : U.S. E.P.A., 1975

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Book
6
Environmental pollution control alternatives : municipal wastewater.
[Washington] : U.S. Environmental Protection Agency, Technology Transfer, 1976

Government Document Book
7
Process design manual for phosphorus removal /
[Washington] : U.S. Environmental Protection Agency, Technology Transfer, 1976
[Rev. ed.].

Government Document Book
8
Environmental pollution control alternatives : municipal wastewater.
[Washington] : U.S. Environmental Protection Agency, Technology Transfer, 1976

Government Document Book
10
Process design manual for upgrading existing wastewater treatment plants.
Washington, D.C. : U.S. Environmental Protection Agency], 1974
[1st revision.

Government Document Book
11
Physical-chemical nitrogen removal: wastewater treatment /
by Culp, Gordon L.
Washington D.C.] : Environmental Protection Agency, Technology Transfer, 1974

Government Document Book
12
Handbook for analytical quality control in water and wastewater laboratories.
Cincinnati, Ohio : Analytical Quality Control Laboratory, National Environmental Research Center for U.S. Environmental Protection Agency, Technology Transfer, 1972

Government Document Book
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