1. A Flotation Process for Water Purification;Hopper;Jour. AWWA,1952
2. Treatment of Water by Flotation;Bryant,1954
3. Foam Separation for Water Clarification;Grieves;J. San. Eng. Div., Am. Soc. Civ. Engrs.,1966
4. Water Clarification by Foam Separation: Bentonite as a Flotation Aid;Grieves;Water and Sewage Works,1966
5. Continuous Foam Flotation for Water Clarification;Grieves;Jour. AWWA,1966