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Wolters, H.
Visscher, J.T.
&
Wolters, H.
, 1989.
Slow sand filtration : a simple and reliable method to purify drinking water
. , pp.p. 20-26: fig., tab.
Publicatiedatum: 29/12/2004
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de Vries, J.
e.a.
, 1987.
Sanitaire voorzieningen in Limeense krottenwijken : een voorstel tot verbetering
, Delft, The Netherlands: Delft University of Technology, ISP. Available at:
https://nl.ircwash.org/sites/default/files/827PELI87-7205.pdf
.
Publicatiedatum: 29/12/2004
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de Vries, J.
e.a.
, 1987.
Servicios sanitarios en los pueblos jovenes de Lima : una propuesta para mejorar la situacion
, Delft, The Netherlands: Delft University of Technology, Department of Civil Engineering. Available at:
https://nl.ircwash.org/sites/default/files/827-6195.pdf
.
Publicatiedatum: 01/01/1970
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