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Biblio
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seepage pits
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Still, D.A.
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1998
P. A. Deverill
and
Still, D. A.
,
“
Building school VIPs : guidelines for the design and construction of ventilated improved pit toilets and associated facilities for schools
”
. National Sanitation Co-ordination Office (NaSCO), Pretoria, South Africa, p. 37 p. : ill., tech. drwngs., 1998.
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