* The material on this page was adapted from: Tilley, E. et al. (2008). [http://www.eawag.ch/organisation/abteilungen/sandec/publikationen/publications_sespcompendium/downloads_sesp/compendium_high.pdf index_EN Compendium of Sanitation Systems and Technologies]. Eawag: The Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland. [[Image:compendium.png|thumb|right|150px|[[Dry toilet |Dry toilet]], in Mexico (for credits, click the picture)]]