Sequential nitrification-denitrification in a plug flow activated sludge system /

Mode of access: Internet.

Identifying sources of subsurface nitrate pollution with stable nitrogen isotopes /

"Contract no. 68-03-2450."

Autotrophic denitrification using sulphur electron donors /

Mode of access: Internet.

A study of nitrate respiration in the activated sludge process /

Mode of access: Internet.

Nitrate-nitrogen concentrations in ground water from three selected areas in Kansas /

Mode of access: Internet.

Nitrate and nitrite variation in ground water /

Cover title.