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2. Chemical-Biological Control of Nitrogen in Wastewater Effluent;BARTH;JWPCF,1968
3. BISHOP, D.F. (1974) Personal Communication. Environmental Protection Agency, Washington, D.C.
4. BROWN and CALDWELL. (1971) Preliminary Design and Precertification Report for the Wastewater Treatment Plant Enlargement and Modifications. Prepared for the Central Contra Costa Sanitary District, March, 1971.
5. BROWN and CALDWELL. (1975) Process Design Manual for Nitrogen Control Technology In Wastewater Treatment Facilities. Prepared for the EPA Office of Technology Transfer.