1. The use of pure oxygen for the biological treatment of brewery waste waters;Jewell,1971
2. Philadelphia pilots -builds oxygen activated sludge;Guarino,1974
3. The use of high-purity oxygen in sewage treatment;Lewandowski;Water Pollut. Control,1974
4. High-purity oxygen in biological treatment of municipal wastewater;Ball;Jour. Water Poll. Control Fed,1972
5. Oxygenation and high-rate biological treatment process;Poon;Jour. Water Poll. Control Fed,1972