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Biomass determination--a new technique for activated sludge control
Biospherics Incorporated. · Environmental Protection Agency]; for sale by the Supt. of Docs., U.S. Govt. Print. Off.
116 sayfa · 1972
Activated sludge process / Adenosine triphosphate / Analysis / Sewage disposal / Sewage sludge
A selected bibliography on health and patient education
Biospherics Incorporated. · Biospherics
55 sayfa · 1978
Bibliography / Health education / Patient education