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M. Segall, Haddon, B., T. Azzani, H. - A., et Topo, L.,
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E. W. Steel et Ehlers, C. E.,
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J. Fisher,
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M. Herzka, Amona, N., et Bloch, M.,
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I. Rajiv Gand IN,
« Technology options for household sanitation ». Rajiv Gandhi National Drinking Water Mission, New Delhi, India, p. 40 p. : 7 boxes, 39 fig., photographs.
K. Probst, Hagmann, J., Fernandez, M., et Ashby, J.,
« Understanding participatory research in the context of natural resource management - paradigms, approaches and typologies », vol. No. 130. Overseas Development Institute, Agricultural Research & Extension Network, London, UK, p. 15 p. : 2 box., 1 tab.