Research on nitrification and related processes, part A

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Research on nitrification and related processes, part B

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Microbiological transformations of nitrogen in flooded maahas clay [microform] Por Manguiat, Ireneo Javier 1945-

Microbiological transformations of nitrogen in flooded maahas clay Por Manguiat, Ireneo Javier 1945-

Nitrogen removal from domestic wastewater in a conventional activated sludge treatment system Por Macute, Jimaima R.