| File Name | Size | Date | |
 | Fertilizer_Producing_No-Pit_Latrine_Viet_Nam_Type_Toilet_2002.pdf | 122 KB | 12/11/2002 |
| How_To_Build_A_Pit_Latrine_1999.pdf | 2491 KB | 9/20/1999 |
| The_Design_Of_Ventilated_Improved_Pit_Latrines_1984.pdf | 13199 KB | 9/20/1999 |
| Ventilated_Improved_Pit_Latrines_Recent_Developments_Zimbabwe_1982.pdf | 5910 KB | 9/20/1999 |
| Ventilated_Pit_Latrines_1999.pdf | 1548 KB | 9/20/1999 |