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Biblio
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Obel-Lawson, E.
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2000
E. Obel-Lawson
y
Njoroge, B. K.
,
«
Small service providers make a big difference
»
, vol. no. 5. World Bank Regional Water and Sanitation Group for East and Southern Africa, Nairobi, Kenya, p. 6 p. : 4 boxes, 6 photogr., 2 tab., 2000.
B. K. Njoroge
y
Obel-Lawson, E.
,
«
Water and sanitation services to the urban poor : small service providers make a big difference in East Africa
»
. Water and Sanitation Program, WSP, Nairobi, Kenya, p. v, 16 p. : 6 tab., 2000.
1998
R. A. Lidonde
y
Obel-Lawson, E.
,
«
Prospective review of participatory hygiene and sanitation transformation (PHAST) : March - April, 1998
»
. UNDP-World Bank, Regional Water and Sanitation Group Eastern and Southern Africa, Nairobi, Kenya, p. viii, 50 p. : boxes, photogr., 1998.
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