How to Buld a Latrine or Pit Toilet: 4 Designs to Consider
Pit latrine - Wikipedia
Ventilated improved pit (VIP) latrines
Applied Sciences | Free Full-Text | Potential Use of Biochar in Pit Latrines as a Faecal Sludge Management Strategy to Reduce Water Resource Contaminations: A Review
How to build a Ventilated Improved Pit Latrine - Howtopedia - english