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Lewis, W.J.

Chilton, P.J. & Lewis, W.J., 1989. The impact of plastic materials on iron levels in village groundwater supplies in Malawi. , ppp. 82-88: fig. Available at: https://pt.ircwash.org/sites/default/files/241.3-89IM-6414.pdf.

Published on: 01/01/1989

Drasar, B.S., Foster, S.S.D. & Lewis, W.J., 1982. The risk of groundwater pollution by on-site sanitation in developing countries, (IRCWD report no. 01/82) Duebendorf, Switzerland: International Reference Centre for Waste Disposal. Available at: https://pt.ircwash.org/sites/default/files/244-82RI-15490.pdf.

Published on: 31/12/2004

Hutton, L.G. & Lewis, W.J., 1981. Nitrate pollution of groundwater in Botswana,

Published on: 30/12/2004

Foster, S.S.D., Lewis, W.J. & Farr, J.L., 1980. The pollution hazard to village water supplies in eastern Botswana. Available at: https://pt.ircwash.org/sites/default/files/212.0-756.pdf.

Published on: 01/01/1970

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