1. Functional Design of Rapid Sand Filters;Hudson;J. San. Eng. Div., ASCE,1963
2. Physical Aspects of Flocculation;Hudson;Jour. AWW A,1965
3. Selection of Sand Filtration Rates;Cleasby;Jour. AWWA,1962
4. Experience With Anthracite-Sand Filters;Conley;Jour. AWWA,1961
5. Discussion-Experience With Anthracite-Sand Filters;Camp;Jour. AWWA,1961