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Biblio
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Keen, J.
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2001
J. Keen
,
«
First international rope pump policy workshop, Managua, 2001 : proceedings
»
. SKAT (Swiss Centre for Development Cooperation in Technology and Management), St. Gallen, Switzerland, p. 69 p., 2001.
1994
E. Baumann
y
Keen, J.
,
«
Afridev deep well handpump specification
»
. SKAT (Swiss Centre for Development Cooperation in Technology and Management), St. Gallen, Switzerland, p. 64 p.: fig., 1994.
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