1. Application of Aerobic Digestion to Industrial Waste Treatment;Barnhart,1961
2. Federal Government Activities in Oxygen-Activated Sludge Process Development;Brenner,1972
3. A Study of Sludge Handling and Disposal;Burd;Water Pollution Control Research Series Publication WP-20-4, USDI, FWPCA,1968
4. Metro Denver's experience with large-scale aerobic digestion of waste activated sludge;Cohen,1973
5. Water Pollution Control-Experimental Procedures for Process Design;Eckenfelder,1970