Biblio

J. A. Butterworth, Soussan, J., Pollard, S., y de Mendiguren, J. C. P., «Allocating water for home-based productive activities in Bushbuckridge, South Africa». Natural Resources Institute, University of Greenwich, Chatham, UK, p. 14 p. : 2 boxes, 8 fig., 2004.

J. Butterworth y Soussan, J., «Water supply and sanitation and integrated water resources management : why seek better integration?», vol. no. 2. IRC and Natural Resources Institute, University of Greenwich, Chatham, UK, p. 16 p. : 2 boxes, 2001.