1. Standard Methods for the Examination of Water and Wastewater;APHA,1980
2. Wastewater treatment during recovery of fats and proteins in a reusable form;Becker,1979
3. Milk and Milk Products;Eckles,1951
4. Dairy wastes;Groeneworld;J. Water Pollut. Contr. Fed.,1983
5. New flocculation units for high efficiency;Grohmann;Water Sci. Technol.,1981