1. Wastewater use in the production of food and fiber,1974
2. Field studies of large-scale maturation ponds with respect to their purification efficiency;Drews,1966
3. Biochemical studies of algal-bacterial symbiosis in high-rate oxidation ponds with varying detention periods and algae;Ganapati;Arch. Hydrobiol.,1975
4. Standard methods for the examination of water and waste water,1965