| File Name | Size | Date | |
 | Slow_Sand_Filtration_1974.pdf | 14939 KB | 9/16/1999 |
| Slow_Sand_Filtration_For_Community_Water_Supply_1987.pdf | 13961 KB | 9/16/1999 |
| Slow_Sand_Filtration_For_Community_Water_Supply_In_Developing_Countries_No-11_1978.pdf | 18159 KB | 9/16/1999 |
| Slow_Sand_Filtration_For_Community_Water_Supply_In_Developing_Countries_No-9_1977.pdf | 5553 KB | 9/16/1999 |