Biblio

D. Schwarz and Green, M. G., “Extracting drinking water from salt water : an overview of desalination options for developing countries”. German Appropriate Technology Exchange (GATE) /Deutsche Gesellschaft für Technische Zusammenarbeit (GTZ), Eschborn, Germany, p. 6 p. : 3 fig., 4 tab., 2001.

D. Schwarz, “Water clarification using Moringa oleifera”, vol. no. W1e. German Appropriate Technology Exchange (GATE) /Deutsche Gesellschaft für Technische Zusammenarbeit (GTZ), Eschborn, Germany, p. 7 p. : 1 fig., 1 photogr., 2000.