Organización Panamericana de la Salud
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filed under:
Internationale Organisationen,
International Organisations
Homepage of the "Organización Panamericana de la Salud", presents several type of sanitation systems, only in Spanish.
The link address is: http://www.col.ops-oms.org/saludambiente/guia-letrinas.htm#Letrina%20tradicional%20simple
