- Settleability Problems and Loss of Solids in the Activated Sludge Process (Wastewater Microbiology Series)
- Microscopic Examination of Activated Sludge Mixed Liquor and Foam (Wastewater Microbiology)
- Wastewater Bacteria
- Nitrification and Denitrification in the Activated Sludge Process
- Protozoa and Metazoa in Wastewater Treatment Processes