| File Name | Size | Date | |
 | Basic_Simple_Water_Filter_2004.txt | 5 KB | 4/2/2010 |
| Do_It_Your_Self-Water_Filtering_Notes_2003+.txt | 2 KB | 3/12/2010 |
 | General_Advice_Filters_How_And_When_To_Change_2007.pdf | 107 KB | 6/12/2007 |
| Planned_Emergency_Water_filtering_In_Its_simplicity_2004+.pdf | 10 KB | 4/2/2010 |
| Purification_Of_Water_On_A_Small_Scale_No-3_1973.pdf | 1822 KB | 9/16/1999 |
| Simple_Survival_Water_Filter_Construction_2004.pdf | 13 KB | 2/19/2010 |
| Water_Filter_1992.txt | 96 KB | 2/10/2010 |
| Water_Filter_Elements_2004.txt | 3 KB | 4/2/2010 |